CN106982419B - Single call end-to-end encryption method and system for broadband cluster system - Google Patents
Single call end-to-end encryption method and system for broadband cluster system Download PDFInfo
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- CN106982419B CN106982419B CN201610029158.0A CN201610029158A CN106982419B CN 106982419 B CN106982419 B CN 106982419B CN 201610029158 A CN201610029158 A CN 201610029158A CN 106982419 B CN106982419 B CN 106982419B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
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Abstract
The application discloses a single call end-to-end encryption method of a broadband cluster system, which comprises the following steps: a security server in the scheduling application platform generates a public key and a private key of the first user terminal and transmits the public key and the private key to the first user terminal; in the process of calling a second user terminal by a first user terminal, sending a public key of the first user terminal to the second user terminal; the second user terminal generates a session key of the call, and transmits the session key encrypted by the public key of the first user terminal to the first user terminal in the call response process; the first user terminal decrypts the encrypted session key by adopting a private key of the first user terminal to obtain a decrypted session key; the first user terminal encrypts the communication content by using the session key, and transmits the encrypted communication content to the second user terminal, and the second user terminal decrypts the received communication content by using the session key. The scheme of the application can realize one-telephone one-secret without increasing the call delay.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a broadband trunking communication technology, and in particular, to a single-call end-to-end encryption method and system for a broadband trunking system.
Background
The broadband cluster (B-trunC) air interface standard is oriented to the broadband requirements of dispatching command and production operation in the industries of public safety, city management and emergency, energy transportation and the like, enhances the broadband cluster functions of voice cluster, multimedia dispatching and the like on the basis of being compatible with LTE R9 broadband data service, and supports flexible bandwidth from 20MHz to 1.4 MHz. The broadband trunking (B-trunk) air interface adopts an innovative downlink shared channel technology, the spectrum efficiency of the group communication service is greatly improved, the trunking function performance index reaches or exceeds the technical level of a professional digital trunking, and the broadband trunking communication standard internationally supports point-to-multipoint voice call, point-to-multipoint multimedia trunking dispatching and other public safety and disaster reduction applications.
In the prior art, the B-TrunC standard has defined a trunking single call service flow, but has not defined a trunking single call end-to-end encryption implementation scheme. For end-to-end encryption of single call service, if the requirement of one-to-one encryption is to be met, a key negotiation process is generally performed in the call process, which needs to increase call delay.
Disclosure of Invention
The application provides a single-call end-to-end encryption method and a single-call end-to-end encryption system for a broadband cluster system, which can realize one-call one-secret without increasing call delay.
The single call end-to-end encryption method for the broadband cluster system, provided by the embodiment of the application, comprises the following steps:
A. a security server in the scheduling application platform generates a public key and a private key of the first user terminal and transmits the public key and the private key to the first user terminal;
B. in the process of calling a second user terminal by a first user terminal, sending a public key of the first user terminal to the second user terminal;
C. the second user terminal generates a session key of the call, and transmits the session key encrypted by the public key of the first user terminal to the first user terminal in the call response process;
D. the first user terminal decrypts the encrypted session key by adopting a private key of the first user terminal to obtain a decrypted session key;
E. the first user terminal encrypts the communication content by using the session key, and transmits the encrypted communication content to the second user terminal, and the second user terminal decrypts the received communication content by using the session key.
Optionally, the method further comprises: the security server updates the public key and the private key of the user terminal periodically.
Optionally, the method further comprises: the security server remotely destroys the public key and the private key of the user terminal.
Optionally, step a comprises:
a1, registering the first user terminal and the security server in the cluster system;
a2, the first user terminal and the security server carry out mutual authentication process, establish secure connection and share secret key;
a3, the security server generates a public key and a private key of the first user terminal, and transmits the encrypted public key and private key to the first user terminal through the security encryption of the shared key;
a4, the first user terminal decrypts the received public key and private key by the shared secret key to obtain the plaintext public key and private key.
Optionally, the shared key is a root key of the first user terminal.
Optionally, in step B, the clear text of the public key of the first user terminal is carried in the call establishment request sent by the first user terminal to the second user terminal.
Optionally, in step C, the encrypted session key is carried in a call confirmation message sent by the second user terminal to the first user terminal.
Optionally, the call confirmation message has an end-to-end encrypted session key selectable message body for carrying the encrypted session key.
The embodiment of the application also provides a broadband cluster system, which comprises a scheduling application platform, a cluster core network and a user terminal, wherein the scheduling application platform comprises a security server, and is used for mutually authenticating with an encryption and decryption module of the user terminal, receiving a shared key of the user terminal after establishing security connection, generating a public key and a private key of the user terminal, encrypting the public key and the private key by using the shared key, and transmitting the encrypted public key and the encrypted private key to the user terminal;
the user terminal includes:
the encryption and decryption module is used for obtaining a root key of the user terminal as a shared key after authentication between the user terminal and the encryption and decryption module; decrypting the public key and the private key received by the security service interface module by using the shared secret key to obtain a public key and a private key of a plaintext; decrypting the encrypted session key received by the calling module by using a private key to obtain a decrypted session key; encrypting the communication content using the session key; the encryption and decryption module is also used for generating a session key of the call when the call module receives plaintext public keys from other terminals, and encrypting the session key by using the received public key; and decrypting the encrypted communication content received by the call module using the session key;
the security service interface module is used for mutually authenticating with the security server, sending the shared secret key to the security server after establishing security connection, and receiving the encrypted public key and the encrypted private key from the security server;
the calling module is used for sending the public key to the called terminal and receiving the encrypted session key from the called terminal in the process that the user terminal serves as a calling terminal to call the called terminal; transmitting the encrypted communication content to the called terminal; and the encryption and decryption module is also used for receiving the plaintext public key from the calling terminal, sending the encrypted session key obtained by the encryption and decryption module to the calling terminal and receiving the encrypted communication content from the calling terminal in the process that the user terminal serves as a called terminal to answer the call.
Optionally, the secure server updates the public key and the private key of the user terminal periodically.
Optionally, the security server remotely destroys the public key and the private key of the user terminal.
Optionally, the scheduling application platform further includes a sound and video recording server, where the sound and video recording server includes an encryption card, and is used to implement sound and video recording of the end-to-end encryption service.
According to the technical scheme, the security server on the network side distributes the key, the user terminal which obtains the key is used as the calling terminal to initiate the single call, the called terminal generates the session key and returns the session key to the calling terminal after being encrypted by the public key of the calling terminal, and the session content is encrypted by the session key. The scheme is suitable for end-to-end encryption of broadband cluster single call service, one session can be encrypted, the key distribution process is combined in the call establishment flow, the call process does not need to be additionally increased, and the call establishment delay is not changed.
Drawings
Fig. 1 is a schematic diagram of an end-to-end encrypted network device architecture according to an embodiment of the present application;
fig. 2 is a schematic diagram of a key distribution process provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a single call flow for implementing end-to-end encryption according to an embodiment of the present application.
Detailed Description
The single-call end-to-end encryption method for the broadband trunking system requires that a calling terminal has a public key and a private key, and the basic flow comprises the following steps:
a security server in the scheduling application platform generates a public key and a private key of the first user terminal and transmits the public key and the private key to the first user terminal;
in the process of calling a second user terminal by a first user terminal, sending a public key of the first user terminal to the second user terminal;
the second user terminal generates a session key of the call, and transmits the session key encrypted by the public key of the first user terminal to the first user terminal in the call response process;
the first user terminal decrypts the encrypted session key by adopting a private key of the first user terminal to obtain a decrypted session key;
the first user terminal encrypts the communication content by using the session key, and transmits the encrypted communication content to the second user terminal, and the second user terminal decrypts the received communication content by using the session key. In the subsequent call, the second user terminal may also encrypt the communication content with the session key, send the encrypted communication content to the first user terminal, and the first user terminal decrypts the received communication content with the session key.
In order to make the technical principle, characteristics and technical effects of the technical scheme of the present application clearer, the technical scheme of the present application is explained in detail with reference to specific embodiments below.
The network device architecture of end-to-end encryption provided by the embodiment of the application is shown in fig. 1. The scheduling application platform 101 includes a plurality of entities: the system comprises a multimedia dispatching Desk (DC), a security server (SeS), a recording/recording server (ReS) and an application server (ApS), wherein the main functions comprise multimedia dispatching command, a unified security mechanism, recording/recording and playback and system expansion application. Each entity has a hardware device or a logic entity: and the encryption card 102 is used for realizing end-to-end encryption service.
The security server is used for realizing key generation and key distribution. Specifically, the security server performs mutual authentication with the encryption and decryption module 105 of the user terminal 104, establishes a secure connection, receives a shared secret key of the user terminal 104, generates a public key and a private key of the user terminal, encrypts the public key and the private key using the shared secret key, and transmits the encrypted public key and the encrypted private key to the user terminal.
The user terminal 104 has therein hardware devices or logical entities: an encryption and decryption module 105. The encryption and decryption module 105 and the user terminal 104 have a communication interface therebetween, and the encryption and decryption module 105 is used for performing authentication between the user terminal 104 and the encryption and decryption module 105 and an authentication process between the encryption and decryption module 105 and a network side, thereby realizing an encryption and decryption function of service data.
Another embodiment of the present application provides a single-call end-to-end encryption method for a broadband cluster system, where a single-call key uses a public key system scheme, and a security server performs periodic key update, and may perform key update on line or perform remote key destruction. The key update procedure may be performed periodically, and the same procedure as the first key distribution may be employed.
The encryption scheme at least comprises a key distribution process and a single call flow for realizing end-to-end encryption by using the key. The key distribution process is incorporated in the call setup procedure, as shown in fig. 2, and includes the following steps:
step 201: and the encryption and decryption module of the user terminal and the security server are registered in the cluster system.
Step 202: the encryption and decryption module of the user terminal and the security server perform mutual authentication process, establish secure connection and perform key sharing. The shared key Ks is the root key of the user terminal.
Step 203: the security server generates a public Key (KPU) and a private Key (KPR) of the user terminal. And the encrypted public key and the encrypted private key are transmitted to the user terminal through the secure encryption of the shared secret key Ks.
Step 204: and the encryption and decryption module of the user terminal decrypts the received public key and the private key by using the shared key to obtain the public key and the private key of the plaintext.
The user terminal registers in the cluster system, and after the network distributes the public key or the private key to the terminal with the end-to-end encryption capability, the terminal can participate in the encrypted single call.
Fig. 3 shows a single call flow for implementing end-to-end encryption according to an embodiment of the present application, which includes the following steps:
step 301: a calling terminal (UE-O) initiates a single call and sends a call establishment request to a Trunking Core Network (TCN). The clear text in the call setup request carries the public key of the UE-O.
Initiating a call at a user terminal, providing an end-to-end encryption option on a call interface, and carrying public key information of UE-O in a call establishment request message and subsequently performing encryption single call if a user selects to initiate the end-to-end encryption call; if the user chooses not to encrypt, the call establishment request does not carry the public key information, and then the common single call is carried out.
Step 302: the cluster core network sends the public key information to a called terminal (UE-T) through a call establishment request of a called side.
Step 303: the called terminal locally generates a session key (e2eSK) for the call.
Step 304: the called terminal sends a call confirmation message to the cluster core network, wherein the call confirmation message carries a session key encrypted by the public key of the calling terminal. The call confirmation message has an end-to-end encryption session key selectable message body used for carrying the encrypted session key.
Step 305: and the cluster core network sends the call confirmation message carrying the session key encrypted by the public key of the calling terminal to the calling terminal.
Step 306: after receiving the call confirmation message of the call, the calling terminal decrypts the message by using the private key of the calling terminal to obtain the session key of the call.
Steps 307 to 309: the called terminal plays the ringing tone, the called terminal answers, and the calling terminal sends an answer response message.
Step 310: the calling terminal encrypts the communication content with the session key and transmits the encrypted communication content to the called terminal. The communication content may be a media stream or a speech encoded stream.
Step 311: the called terminal decrypts the received communication content with the session key.
Similarly, during the session, the called terminal may encrypt the communication content with the session key and send the encrypted communication content to the calling terminal, and the calling terminal decrypts the received communication content with the session key.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the scope of the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the technical solution of the present application should be included in the scope of the present application.
Claims (10)
1. A single call end-to-end encryption method of a broadband cluster system is characterized by comprising the following steps:
A. a security server in the scheduling application platform generates a public key and a private key of the first user terminal and transmits the public key and the private key to the first user terminal;
B. in the process of calling a second user terminal by a first user terminal, sending a public key of the first user terminal to the second user terminal;
C. the second user terminal generates a session key of the call, and transmits the session key encrypted by the public key of the first user terminal to the first user terminal in the call response process;
D. the first user terminal decrypts the encrypted session key by adopting a private key of the first user terminal to obtain a decrypted session key;
E. the first user terminal encrypts the communication content by using the session key, and sends the encrypted communication content to the second user terminal, and the second user terminal decrypts the received communication content by using the session key;
in the step B, the clear text of the public key of the first user terminal is carried in a call establishment request sent by the first user terminal to the second user terminal;
in step C, the encrypted session key is carried in a call confirmation message sent by the second user terminal to the first user terminal.
2. The method of claim 1, further comprising: the security server updates the public key and the private key of the user terminal periodically.
3. The method of claim 1, further comprising: the security server remotely destroys the public key and the private key of the user terminal.
4. The method of claim 1, wherein step a comprises:
a1, registering the first user terminal and the security server in the cluster system;
a2, the first user terminal and the security server carry out mutual authentication process, establish secure connection and share secret key;
a3, the security server generates a public key and a private key of the first user terminal, and transmits the encrypted public key and private key to the first user terminal through the security encryption of the shared key;
a4, the first user terminal decrypts the received public key and private key by the shared secret key to obtain the plaintext public key and private key.
5. The method of claim 4, wherein the shared key is a root key of the first user terminal.
6. The method of claim 1, wherein the call confirmation message has an end-to-end encrypted session key optional message body for carrying the encrypted session key.
7. A broadband cluster system comprises a scheduling application platform, a cluster core network and a user terminal, and is characterized in that the scheduling application platform comprises a security server, and the security server is used for mutually authenticating with an encryption and decryption module of the user terminal, receiving a shared key of the user terminal after establishing security connection, generating a public key and a private key of the user terminal, encrypting the public key and the private key by using the shared key, and transmitting the encrypted public key and the encrypted private key to the user terminal;
the user terminal includes:
the encryption and decryption module is used for obtaining a root key of the user terminal as a shared key after authentication between the user terminal and the encryption and decryption module; decrypting the public key and the private key received by the security service interface module by using the shared secret key to obtain a public key and a private key of a plaintext; decrypting the encrypted session key received by the calling module by using a private key to obtain a decrypted session key; encrypting the communication content using the session key; the encryption and decryption module is also used for generating a session key of the call when the call module receives plaintext public keys from other terminals, and encrypting the session key by using the received public key; and decrypting the encrypted communication content received by the call module using the session key;
the security service interface module is used for mutually authenticating with the security server, sending the shared secret key to the security server after establishing security connection, and receiving the encrypted public key and the encrypted private key from the security server;
the calling module is used for sending the public key to the called terminal and receiving the encrypted session key from the called terminal in the process that the user terminal serves as a calling terminal to call the called terminal; transmitting the encrypted communication content to the called terminal; and the encryption and decryption module is also used for receiving the plaintext public key from the calling terminal, sending the encrypted session key obtained by the encryption and decryption module to the calling terminal and receiving the encrypted communication content from the calling terminal in the process that the user terminal serves as a called terminal to answer the call.
8. The system of claim 7, wherein the security server periodically updates a public key and a private key of the user terminal.
9. The system of claim 7, wherein the security server remotely destroys the public key and the private key of the user terminal.
10. The system of claim 7, wherein the scheduling application platform further comprises a video recording server, and the video recording server comprises an encryption card for implementing video recording of end-to-end encryption service.
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| CN201610029158.0A CN106982419B (en) | 2016-01-18 | 2016-01-18 | Single call end-to-end encryption method and system for broadband cluster system |
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| CN201610029158.0A CN106982419B (en) | 2016-01-18 | 2016-01-18 | Single call end-to-end encryption method and system for broadband cluster system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107547570B (en) * | 2017-09-30 | 2023-12-05 | 国信优易数据股份有限公司 | Data security service platform and data security transmission method |
| CN108174344B (en) * | 2017-12-25 | 2020-05-08 | 成都三零瑞通移动通信有限公司 | GIS position information transmission encryption method and device in trunking communication |
| CN109120641B (en) * | 2018-09-28 | 2022-09-09 | 中国平安财产保险股份有限公司 | Report automatic uploading method and device, computer equipment and storage medium |
| CN111211889A (en) * | 2019-12-27 | 2020-05-29 | 深圳市普天宜通技术股份有限公司 | Safety talkback method, equipment, system and storage medium |
| CN111245564B (en) * | 2020-01-06 | 2021-04-13 | 电子科技大学 | Triple security coding method based on hardware secret circuit |
| WO2023039871A1 (en) * | 2021-09-18 | 2023-03-23 | 海能达通信股份有限公司 | Data monitoring method, apparatus, device and system |
| CN114630290A (en) * | 2022-04-08 | 2022-06-14 | 中国电信股份有限公司 | Key agreement method, device, equipment and storage medium for voice encryption communication |
| CN117119449B (en) * | 2023-10-20 | 2024-01-19 | 长江量子(武汉)科技有限公司 | Vehicle cloud safety communication method and system |
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