CN114666081B - Warning message output method, warning message distribution method, device and related equipment - Google Patents

Abstract

The present application provides a warning message output method, a warning message distribution method, an apparatus and related equipment, the warning message output method comprising: receiving a warning message sent by a network device, the warning message being a warning message signed by a warning message issuing device using a private key; obtaining a blockchain certificate of the warning message issuing device from an alliance chain, and obtaining a public key of the warning message issuing device based on the blockchain certificate; using the public key to perform signature verification on the warning message; and outputting the warning message when the signature verification passes. The present application can improve the security of issuing warning messages.

Description

Warning message output method, warning message distribution method, device and related equipment

Technical Field

The present application relates to the field of blockchain technology, and more specifically, to an early warning message output method, an early warning message distribution method, an apparatus and related equipment.

Background Art

Before a public emergency occurs, the emergency warning message issuing department issues warning messages to the public via mobile phone text messages, notifying the public of the impending public emergency and informing the public of preventive measures to reduce the loss of life and property caused by the incident. Warning messages are generally sent via community broadcast text messages, which have the following features: they can be sent to millions of users in near real-time in the language required by the designated area, and all warning messages must be signed and processed by the warning message management center. However, if the warning message is tampered with when it is transmitted to the warning information management center, it will be difficult to determine the responsibility, resulting in poor security in the issuance of warning messages.

Summary of the invention

The embodiments of the present application provide a warning message output method, a warning message distribution method, an apparatus and related equipment to solve the problem of poor security in sending warning messages.

To solve the above problems, this application is implemented as follows:

In a first aspect, an embodiment of the present application provides a warning message output method, which is executed by a terminal, and the method includes:

Receiving a warning message sent by a network device, wherein the warning message is a warning message signed by a warning message issuing device using a private key;

Obtaining a blockchain certificate of the warning message issuing device from the alliance chain, and obtaining a public key of the warning message issuing device based on the blockchain certificate;

Use the public key to perform signature verification on the warning message;

When the signature verification passes, the warning message is output.

In a second aspect, an embodiment of the present application provides a warning message distribution method, which is executed by a warning message publishing device, and the method includes:

Use the private key to sign the warning message;

distributing the signed warning message;

Among them, the public key corresponding to the private key is included in the blockchain certificate, and the blockchain certificate is managed through an alliance chain composed of the early warning message publishing device and the supervision device corresponding to the supervision department.

In a third aspect, the embodiment of the present application further provides a warning message output device, including:

A receiving module, used to receive a warning message sent by a network device, wherein the warning message is a warning message signed by a warning message issuing device using a private key;

A first acquisition module is used to obtain a blockchain certificate of the warning message issuing device from the alliance chain, and obtain a public key of the warning message issuing device based on the blockchain certificate;

A verification module, used to perform signature verification on the warning message using the public key;

The output module is used to output the warning message when the signature verification passes.

In a fourth aspect, an embodiment of the present application further provides a warning message distribution device, including:

Signature module, used to sign the warning message using a private key;

A distribution module, used for distributing the signed warning message;

Among them, the public key corresponding to the private key is included in the blockchain certificate, and the blockchain certificate is managed through an alliance chain composed of the early warning message publishing device and the supervision device corresponding to the supervision department.

In the fifth aspect, an embodiment of the present application also provides a communication device, comprising: a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that the processor is used to read the program in the memory to implement the steps in the method described in the first aspect above; or, the steps in the method described in the second aspect above.

In a sixth aspect, an embodiment of the present application further provides a readable storage medium for storing a program, wherein when the program is executed by a processor, the program implements the steps in the method described in the first aspect above, or implements the steps in the method described in the second aspect above.

In an embodiment of the present application, the blockchain certificate of the warning message issuing device is obtained from the alliance chain, the public key of the warning message issuing device is obtained based on the blockchain certificate, and the public key is used to perform signature verification on the warning message. When the signature verification passes, the warning message is output, which can verify the identity of the warning message issuing device and the integrity of the warning message, thereby avoiding unclear responsibility if the warning message is tampered with during the transmission process, thereby improving the security of the warning message issuance.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is a schematic diagram of a process of outputting a warning message according to an embodiment of the present application;

FIG2 is a schematic diagram of a process of distributing warning messages according to an embodiment of the present application;

FIG3 is a schematic diagram of the structure of an early warning message output system applicable to an embodiment of the present application;

FIG4 is a schematic diagram of a structure of a warning message output device according to an embodiment of the present application;

FIG5 is a second structural diagram of the warning message output device provided in an embodiment of the present application;

FIG6 is a schematic diagram of a structure of a warning message distribution device according to an embodiment of the present application;

FIG7 is a second structural diagram of the warning message distribution device provided in an embodiment of the present application;

FIG8 is a schematic diagram of the structure of a communication device provided in an implementation of the present application.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The terms "first", "second" etc. in the embodiments of the present application are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. In addition, the terms "include" and "have" and any variation thereof are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment. In addition, "and/or" is used in the present application to represent at least one of connected objects, such as A and/or B and/or C, representing the inclusion of separate A, separate B, separate C, and A and B all exist, B and C all exist, A and C all exist, and 7 situations that A, B and C all exist.

Referring to Figure 1, Figure 1 is a schematic flow chart of a warning message output method provided in an embodiment of the present application. The warning message output method shown in Figure 1 can be executed by a terminal.

As shown in FIG1 , the warning message output method may include the following steps:

Step 101: Receive a warning message sent by a network device, where the warning message is a warning message signed by a warning message issuing device using a private key.

The terminal (also called User Equipment (UE)) can be a mobile phone, tablet computer (Tablet Personal Computer), laptop computer (Laptop Computer), personal digital assistant (Personal Digital Assistant, PDA), mobile Internet device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted equipment, etc. The network equipment can be a base station, access and mobility management function (Access and Mobility Management Function, AMF), relay, access point or other network elements, etc.

The above-mentioned warning message issuing device can be a device used by the warning message issuing department (Cell Broadcast Entity, CBE) to issue warning messages. The warning message issuing department (for example: Meteorological Bureau, Earthquake Bureau, etc.) can be responsible for initiating cell broadcast services, inputting cell broadcast messages, sending, querying, deleting, setting broadcast short message priorities and controlling broadcast areas, etc. The above-mentioned network equipment can be deployed in the operator network as CBC (Cell Broadcast Center). As a component of the mobile network, CBC is managed by the basic telecommunications operator. It is responsible for all base station layout related information, and is responsible for managing base station loads and mapping geographic information to valid wireless cells. It sends short messages generated by CBE to UE through the wireless access network.

The signature of the warning message may be a result obtained by the warning message issuing device using a hash algorithm to hash the content of the warning message and then signing the hash value.

Step 102: Obtain the blockchain certificate of the warning message issuing device from the alliance chain, and obtain the public key of the warning message issuing device based on the blockchain certificate.

Among them, the above-mentioned alliance chain can be a blockchain jointly managed by several institutions. For example, the above-mentioned alliance chain can specify the warning message publishing device as the accounting node. The generation of each block is jointly determined by all pre-selected nodes using a consensus mechanism. Other access nodes can read the information on the chain, but do not participate in the accounting process. The alliance chain uses distributed ledgers and distributed consensus technology to form a distributed database in which data cannot be tampered with, which also solves the multi-party trust problem. The above-mentioned warning message publishing device can publish its own public key on the alliance chain as an accounting node, and the terminal can access the alliance chain to obtain the public key of the above-mentioned warning message publishing device.

In addition, there is no requirement for the execution order of step 101 and step 102. For example, step 101 can be executed first, and the corresponding warning message issuing device can be obtained through the received warning message, and then the blockchain certificate of the warning message issuing device can be found in the alliance chain to obtain the public key of the warning message issuing device. Alternatively, step 102 can be executed first, and the terminal can pre-cache the alliance chain to obtain the public keys of all warning message issuing devices, or the corresponding warning message issuing device can be obtained from the online alliance chain after receiving the warning message. The present application does not impose any restrictions on this.

Step 103: Use the public key to perform signature verification on the warning message.

Step 104: When the signature verification is successful, output the warning message.

The above-mentioned method of outputting the warning message may be to remind the terminal of the warning message, such as voice broadcast, vibration, ringing, message pop-up window, SMS reminder, etc. If the signature verification is passed, the integrity of the warning message and the identity of the warning message issuing device can be guaranteed.

In an embodiment of the present application, the blockchain certificate of the warning message issuing device is obtained from the alliance chain, the public key of the warning message issuing device is obtained based on the blockchain certificate, and the public key is used to perform signature verification on the warning message. When the signature verification passes, the warning message is output, which can verify the identity of the warning message issuing device and the integrity of the warning message, thereby avoiding unclear responsibility caused by tampering with the warning message during the transmission process, thereby improving the security of the issuance of the warning message.

In addition, the public key is used to verify the signature of the warning message signed by the received warning message issuing device using the private key. When the signature verification passes, the warning message is output, so that the warning message can be signed and issued directly from the warning message issuing device, avoiding the situation where the warning message is signed and issued through the warning message management center but the warning message management center has problems and cannot issue the warning message in time, thereby improving the timeliness of the warning message.

Optionally, the warning message may include the name of the warning message issuing department corresponding to the warning message issuing device;

The step 102 of obtaining the blockchain certificate of the warning message issuing device from the alliance chain and obtaining the public key of the warning message issuing device based on the blockchain certificate may include:

According to the name, a blockchain certificate of the early warning message issuing device is obtained in the alliance chain, and based on the blockchain certificate, a public key of the early warning message issuing device is obtained.

Among them, the name of the above-mentioned warning message issuing device and the public key can be in a corresponding relationship. The warning message issuing device can be used as a bookkeeping node in the alliance chain to write the public key of the warning message issuing device to the alliance chain through a consensus mechanism. The terminal can access the alliance chain and find the corresponding public key according to the name of the warning message issuing device, thereby realizing the signature verification of the warning message. The access users of the above-mentioned alliance chain can be all terminals in the preset area. For example, even if the user terminal leaves the service area where it is registered and moves to another service area, it can also access the alliance chain, obtain the public key of the warning message issuing device, and use the public key to verify the signature of the received warning message.

In this implementation, the public key of the warning message issuing device is obtained in the alliance chain through the name of the warning message issuing department corresponding to the warning message issuing device. The public key of the warning message issuing device can be obtained by accessing the alliance chain, which can avoid the situation where only terminals with the public key pre-installed can output the warning message after signature verification, thereby increasing the number of terminals that successfully send the warning message.

Optionally, obtaining a blockchain certificate of the warning message issuing device in the alliance chain according to the name, and obtaining a public key of the warning message issuing device based on the blockchain certificate includes:

Among the multiple blockchain certificates included in the alliance chain, the blockchain certificate of the early warning message issuing device is searched, and the blockchain certificate includes the name and public key of the early warning message issuing department.

Among them, the above-mentioned blockchain certificate can be searched by the name of the warning message issuing department. For example, the above-mentioned alliance chain can be cached in advance to obtain the blockchain certificates of all warning message issuing departments, thereby obtaining the public keys of all warning message issuing departments, and then obtaining the public key of the warning message issuing department corresponding to the above-mentioned warning message issuing device according to the above-mentioned name in the above-mentioned warning message; or, after receiving the above-mentioned warning message, the blockchain certificate of the corresponding warning message issuing department can be obtained on the alliance chain according to the above-mentioned name in the above-mentioned warning message, thereby obtaining the public key of the warning message issuing department corresponding to the above-mentioned warning message issuing device. This embodiment does not limit this.

The blockchain certificate can be a self-signed X.509 certificate or a certificate in a custom format. Regardless of the certificate format, the blockchain certificate should contain the public key of the warning message issuing device, the name of the warning message issuing department corresponding to the warning message issuing device, the validity period of the certificate, the status of the certificate, etc. The warning message issuing device generates the blockchain certificate and marks the blockchain certificate as valid. As a bookkeeping node, it initiates a transaction. The nodes with bookkeeping rights on the alliance chain use a consensus mechanism to write the blockchain certificate into the alliance chain.

In this implementation, the public key of the warning message issuing device is obtained in the alliance chain through the name of the warning message issuing department corresponding to the warning message issuing device, so that the terminal can obtain the public key of the warning message issuing department corresponding to the warning message issuing device by accessing the alliance chain, and realize the signature verification of the warning message. This can enable all terminals in the warning message issuing area to complete the signature verification of the warning message, avoiding the situation where roaming users cannot verify the warning message in another service area, and can improve the success rate of the warning message being sent to the terminal.

Optionally, the warning message also includes a count of message sending and a timestamp of message sending;

Before using the public key to perform signature verification on the warning message in step 103, the warning message output method may further include the following steps:

When the timestamp is within a preset range and the count is greater than the count of the warning message outputted by the terminal last time, the name of the warning message issuing department corresponding to the warning message issuing device is obtained.

Among them, the timestamp sent by the above message is compared with the current time of the user terminal. If the time difference is too far, the warning message is determined to be a replay attack. The count sent by the above message is compared with the count of the warning message output by the terminal last time. If the count of this warning message is less than or equal to the count of the last warning message, it can also be determined that the warning message is a replay attack, and the warning message of the replay attack is not output.

In this implementation, before using the public key to sign and verify the warning message, the timestamp and count of the warning message are verified. When the timestamp is within a preset range and the count is greater than the warning message count last output by the terminal, the name of the warning message issuing department corresponding to the warning message issuing device is obtained, and then the public key of the warning message issuing device is obtained based on the name. The warning message is verified by the timestamp and count of the message sending, thereby preventing the attacker's replay attack.

Referring to Figure 2, Figure 2 is a schematic diagram of a process flow of a warning message distribution method provided in an embodiment of the present application. The warning message distribution method shown in Figure 2 can be executed by a warning message issuing device.

As shown in FIG2 , the warning message distribution method may include the following steps:

Step 201: Use a private key to sign the warning message.

Step 202: Distribute the signed warning message;

Among them, the public key corresponding to the private key is included in the blockchain certificate, and the blockchain certificate is managed through an alliance chain composed of the early warning message publishing device and the supervision device corresponding to the supervision department.

Optionally, the warning message may include the name of the warning message issuing department corresponding to the warning message issuing device.

Optionally, the warning message distribution method may further include the following steps:

Generate a blockchain certificate and publish the blockchain certificate to the alliance chain, wherein the blockchain certificate includes the name and public key of the warning message issuing department corresponding to the warning message issuing device.

Optionally, the warning message may also include a message sending count and a message sending timestamp.

It should be noted that this embodiment is an implementation of the warning message issuing device corresponding to the above method embodiment, therefore, reference may be made to the relevant description in the above method embodiment, and the same beneficial effects can be achieved. To avoid repeated description, it will not be repeated here.

The various optional implementation modes introduced in the embodiments of the present application may be implemented in combination with each other or may be implemented separately if they do not conflict with each other, and the embodiments of the present application are not limited to this.

For ease of understanding, the following examples are provided:

Refer to Figure 3, which is a structural diagram of the warning message output system applicable to the embodiment of the present application. As shown in Figure 3, it includes a warning message publishing device 31, an operator network 32 and a user terminal 33.

Among them, the multiple warning message issuing devices 31 have their own corresponding warning message issuing departments.

The warning message output method may include the following processes:

Each warning message publishing device 31 directly uses its own private key to sign the warning message, and sends the signed warning message to the operator network 32. The operator network 32 selects the base station in the corresponding area for cell broadcasting according to the sending requirements in the received warning message. The user terminal 33 verifies the signature of the signed warning message according to the public key of the warning message publishing device.

The sending requirement can be obtained from the content of the received signed warning message. For example, the warning message issuing device uses its own private key to sign the warning message content, and its format is as follows:

MESSAGE|COUNT|TIMESTAMP|NAME|AREA|HASH ALG ID|SIGN ALG ID;

Here, | indicates the cascade of information, MESSAGE indicates the warning message, COUNT indicates the count of message sending, TIMESTAMP indicates the timestamp when the message is sent, NAME indicates the name of the warning message issuing department, AREA indicates the broadcast area of the warning message, HASH ALG ID is used to indicate the hash algorithm used, SIGN ALG ID is used to indicate the signature algorithm used, and the signed warning message is as follows:

MESSAGE|COUNT|TIMESTAMP|NAME|AREA|HASH ALG ID|SIGN ALG ID|SIGNATURE;

SIGNATURE indicates the result obtained by hashing the content to be signed using a hash algorithm and then signing the hash value.

The broadcast area of the warning message represented by AREA can be understood as the sending requirements followed by the operator network 32 in selecting the base station in the corresponding area for cell broadcasting.

Among them, the user terminal 33 performs signature verification on the signed warning message according to the public key of the warning message issuing device 31, which specifically includes the following process: after the user terminal 33 receives the signed warning message, first verify whether the timestamp is within an acceptable range. If so, determine whether the counter is higher than the counter of the warning message received last time. If so, determine that the warning message is not a replay message; the user terminal 33 then searches the locally stored alliance chain to determine whether the name of the warning message issuing department can be found. If not, update the alliance chain from the Internet. If the name of the warning message issuing department is found in the updated alliance chain, the corresponding public key can be found, and the warning message is verified using this public key. If successful, the warning message is displayed, otherwise the warning message is not displayed; if the name of the warning message issuing department is not found in the updated alliance chain, the warning message is not displayed. In this way, the warning message can be verified by the cooperation of the timestamp and the counter, and the warning message determined to be a replay message is not displayed, thereby preventing the attacker from replaying the previous round of warning messages.

Among them, the alliance chain can be composed of the warning message issuing device 31 of the warning message issuing department and the supervision device of the supervision department. The public key of the warning message issuing device 31 is written into the alliance chain through the consensus mechanism of the alliance chain based on the blockchain certificate. The user terminal 33 can obtain the public key of the warning message issuing department by accessing the alliance chain, thereby realizing the verification of the warning message. The warning message issuing device 31 needs to generate a blockchain certificate and mark the blockchain certificate as valid. The warning message issuing device 31 acts as a bookkeeping node to initiate a transaction. The nodes with bookkeeping rights on the alliance chain use the consensus mechanism to write the blockchain certificate into the alliance chain. In addition, the user terminal 33 can also include user terminals registered in other service areas. For roaming user terminals located in the broadcast area of the warning message, the public key of the warning message issuing device can also be obtained by accessing the alliance chain, thereby realizing the signature verification of the warning message.

In this embodiment, the warning message publishing device 31 directly uses its own private key to sign the warning message, and sends the signed warning message to the operator network 32. The operator network 32 selects the base station in the corresponding area for cell broadcasting according to the broadcast area of the received warning message, and the user terminal 33 verifies the signature of the warning message according to the public key of the warning message publishing device 31; the public key of the warning message publishing device 31 is written into the alliance chain through the consensus mechanism of the alliance chain based on the blockchain certificate. The user terminal 33 can obtain the public key of the warning message publishing device 31 by accessing the alliance chain, thereby realizing the signature verification of the warning message, determining the identity of the advance message publishing device and the integrity of the warning message, and there is no need to set up a special warning message management center, which can overcome the problems of single point failure and unclear responsibility in the prior art.

Refer to Figure 4, which is one of the structural diagrams of the warning message output device provided in the embodiment of the present application. As shown in Figure 4, the warning message output device 400 includes:

The receiving module 401 is used to receive a warning message sent by a network device, where the warning message is a warning message signed by a warning message issuing device using a private key;

A first acquisition module 402 is used to obtain the public key of the warning message issuing device from the alliance chain;

Verification module 403, used to use the public key to perform signature verification on the warning message;

The output module 404 is used to output the warning message when the signature verification passes.

Optionally, the warning message includes the name of the warning message issuing department corresponding to the warning message issuing device;

The first acquisition module 402 may be specifically used for:

Obtain the public key of the warning message issuing device in the alliance chain according to the name.

Optionally, obtaining the public key of the warning message issuing device in the alliance chain according to the name may include:

Among the multiple blockchain certificates included in the alliance chain, the blockchain certificate of the early warning message issuing device is searched, and the blockchain certificate includes the name and public key of the early warning message issuing department.

Optionally, the warning message also includes a count of message sending and a timestamp of message sending;

As shown in FIG5 , the warning message output device 400 may further include:

The second acquisition module 405 is used to acquire the name of the target warning message issuing department when the timestamp is within a preset range and the count is greater than the count of the warning message output by the terminal last time.

The warning message output device 400 can implement each process of the method embodiment of Figure 1 in the embodiment of the present application, and achieve the same beneficial effects. To avoid repetition, it will not be repeated here.

The warning message output device 500 can implement each process of the method embodiment of Figure 1 in the embodiment of the present application, and achieve the same beneficial effects. To avoid repetition, it will not be repeated here.

Refer to Figure 6, which is one of the structural diagrams of the warning message distribution device provided in the embodiment of the present application. As shown in Figure 6, the warning message distribution device 600 includes:

The signature module 601 is used to sign the warning message using a private key;

A distribution module 602, configured to distribute the signed warning message;

Among them, the public key corresponding to the private key is included in the alliance chain.

Optionally, the warning message includes the name of the warning message issuing department corresponding to the warning message issuing device.

Optionally, as shown in FIG7 , the warning message distribution device 600 may further include:

The generation module 603 is used to generate a blockchain certificate and publish the blockchain certificate to the alliance chain, wherein the blockchain certificate includes the name and public key of the warning message issuing department corresponding to the warning message issuing device.

Optionally, the warning message may also include a message sending count and a message sending timestamp.

The warning message distribution device 600 can implement each process of the method embodiment of Figure 2 in the embodiment of the present application, and achieve the same beneficial effects. To avoid repetition, it will not be repeated here.

The embodiment of the present application further provides a communication device. Referring to FIG8 , the communication device may include a processor 801 , a memory 802 , and a program 8021 stored in the memory 802 and executable on the processor 801 .

When the communication device is a terminal, program 8021 can implement any steps in the method embodiment corresponding to Figure 1 and achieve the same beneficial effects when executed by processor 801, which will not be repeated here.

In the case where the communication device is a warning message publishing device, when program 8021 is executed by processor 801, any steps in the method embodiment corresponding to Figure 2 can be implemented and the same beneficial effects can be achieved, which will not be repeated here.

A person of ordinary skill in the art can understand that all or part of the steps of implementing the above-mentioned embodiment method can be completed by hardware related to program instructions, and the program can be stored in a readable medium. The present application embodiment also provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, any step in the method embodiment corresponding to FIG. 1 or FIG. 2 can be implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

The above is a preferred implementation of the embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims (7)

1. A warning message output method, executed by a terminal, characterized in that it includes: Receiving a warning message sent by a network device, wherein the warning message is a warning message signed by a warning message issuing device using a private key; Obtaining a blockchain certificate of the warning message issuing device from the alliance chain, and obtaining a public key of the warning message issuing device based on the blockchain certificate; Use the public key to perform signature verification on the warning message; When the signature verification is passed, output the warning message; The warning message includes the name of the warning message issuing department corresponding to the warning message issuing device; The step of obtaining a blockchain certificate of the warning message issuing device from the alliance chain, and obtaining a public key of the warning message issuing device based on the blockchain certificate, includes: Obtaining a blockchain certificate of the warning message issuing device in the alliance chain according to the name, and obtaining a public key of the warning message issuing device based on the blockchain certificate; The warning message also includes a count of message sending and a timestamp of message sending; Before using the public key to perform signature verification on the early warning message, the method further includes: When the timestamp is within a preset range and the count is greater than the count of the warning message outputted by the terminal last time, the name of the warning message issuing department corresponding to the warning message issuing device is obtained. 2. The method according to claim 1, characterized in that the step of obtaining a blockchain certificate of the warning message issuing device in the alliance chain according to the name, and obtaining a public key of the warning message issuing device based on the blockchain certificate, comprises: Among the multiple blockchain certificates included in the alliance chain, the blockchain certificate of the early warning message issuing device is searched, and the blockchain certificate includes the name and public key of the early warning message issuing department. 3. A warning message distribution method, executed by a warning message issuing device, characterized in that it includes: Use the private key to sign the warning message; distributing the signed warning message; The public key corresponding to the private key is included in the blockchain certificate, and the blockchain certificate is managed by a consortium chain consisting of the early warning message issuing device and the supervisory device corresponding to the supervisory department; The warning message includes the name of the warning message issuing department corresponding to the warning message issuing device; Generate a blockchain certificate, and publish the blockchain certificate to the alliance chain, wherein the blockchain certificate includes the name and public key of the warning message issuing department corresponding to the warning message issuing device, so that the terminal obtains the blockchain certificate of the warning message issuing device in the alliance chain according to the name, and obtains the public key of the warning message issuing device based on the blockchain certificate; The warning message also includes a message sending count and a message sending timestamp, so that the terminal obtains the name of the warning message issuing department corresponding to the warning message issuing device when the timestamp is within a preset range and the count is greater than the warning message count output by the terminal last time. 4. A warning message output device, characterized in that it includes: A receiving module, used to receive a warning message sent by a network device, wherein the warning message is a warning message signed by a warning message issuing device using a private key; A first acquisition module is used to obtain a blockchain certificate of the warning message issuing device from the alliance chain, and obtain a public key of the warning message issuing device based on the blockchain certificate; A verification module, used to perform signature verification on the warning message using the public key; An output module, used for outputting the warning message when the signature verification passes; The warning message includes the name of the warning message issuing department corresponding to the warning message issuing device; The first acquisition module is specifically used for: Obtaining a blockchain certificate of the warning message issuing device in the alliance chain according to the name, and obtaining a public key of the warning message issuing device based on the blockchain certificate; The warning message also includes a count of message sending and a timestamp of message sending; The warning message output device is also used to perform the following operations: Before using the public key to perform signature verification on the warning message, the method further includes: When the timestamp is within a preset range and the count is greater than the count of the warning message outputted by the terminal last time, the name of the warning message issuing department corresponding to the warning message issuing device is obtained. 5. A warning message distribution device, characterized in that it includes: Signature module, used to sign the warning message using a private key; A distribution module, used for distributing the signed warning message; The public key corresponding to the private key is included in the blockchain certificate, and the blockchain certificate is managed by a consortium chain consisting of the warning message issuing device and the supervisory device corresponding to the supervisory department; the warning message includes the name of the warning message issuing department corresponding to the warning message issuing device; Generate a blockchain certificate, and publish the blockchain certificate to the alliance chain, wherein the blockchain certificate includes the name and public key of the warning message issuing department corresponding to the warning message issuing device, so that the terminal obtains the blockchain certificate of the warning message issuing device in the alliance chain according to the name, and obtains the public key of the warning message issuing device based on the blockchain certificate; The warning message also includes a message sending count and a message sending timestamp, so that the terminal obtains the name of the warning message issuing department corresponding to the warning message issuing device when the timestamp is within a preset range and the count is greater than the warning message count output by the terminal last time. 6. A communication device, comprising: a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that the processor is used to read the program in the memory to implement the steps in the warning message output method as described in any one of claims 1 to 2, or the steps in the warning message distribution method as described in claim 3. 7. A readable storage medium for storing a program, characterized in that when the program is executed by a processor, it implements the steps in the warning message output method as described in any one of claims 1 to 2, or implements the steps in the warning message distribution method as described in claim 3.