CN111371797B - Credible identity authentication method and system in communication session - Google Patents
Credible identity authentication method and system in communication session Download PDFInfo
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- CN111371797B CN111371797B CN202010173188.5A CN202010173188A CN111371797B CN 111371797 B CN111371797 B CN 111371797B CN 202010173188 A CN202010173188 A CN 202010173188A CN 111371797 B CN111371797 B CN 111371797B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0807—Network architectures or network communication protocols for network security for authentication of entities using tickets, e.g. Kerberos
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/20—Network architectures or network communication protocols for network security for managing network security; network security policies in general
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
Abstract
The invention relates to a method and a system for authenticating a trusted identity in a communication session, wherein the method comprises the following steps: the calling party has a credible identity certificate issued by an authority organization; a calling party initiates a session request to a called party, generates a communication token for the session at the same time, and transmits the communication token to the called party; the called party receives a session request of the calling party, obtains a communication token associated with the session, and further obtains a trusted identity certificate of the calling party; the called party verifies the credible identity certificate of the calling party, verifies the communication token by using the credible identity certificate of the calling party, and then determines a subsequent processing flow aiming at the session request according to a verification result and a pre-configured control strategy. According to the credible identity authentication technology in the communication session, in the user calling process, the communication terminal of the calling party can generate the communication token signed by using the user private key, and the communication terminal of the called party can verify the communication token and display credible identity information of the calling party on a ringing interface.
Description
Technical Field
The invention relates to the technical field of information transmission, in particular to a method and a system for authenticating a trusted identity in a communication session.
Background
Currently, fraud calls and nuisance calls are increasing due to the fact that a large amount of user privacy information is leaked out intentionally or unintentionally. To avoid supervision, some individuals or organizations illegally falsely call others or other organizations with their telephone numbers, engage in fraud, or play advertisements. More and more people are not very much, and the incoming call with unknown number is directly refused. This situation results in many units/organizations having customer service calls that are not accessible, which severely affects the units/organizations' normal operations. Therefore, how to protect users from the troubles of fraud and harassing calls and ensure normal telephone services is a technical problem to be solved urgently.
Disclosure of Invention
The present invention provides a method and a system for authenticating a trusted identity in a communication session, which aims at the above technical problems.
In order to solve the above technical problem, a first technical solution adopted in the embodiments of the present invention is as follows:
a method for authenticating a trusted identity in a communication session, comprising the steps of:
the calling party has a credible identity certificate issued by an authority organization; a calling party initiates a session request to a called party, generates a communication token for the session at the same time, and transmits the communication token to the called party; the called party receives a session request of the calling party, obtains a communication token associated with the session, and further obtains a trusted identity certificate of the calling party; the called party verifies the credible identity certificate of the calling party, verifies the communication token by using the credible identity certificate of the calling party, and then determines a subsequent processing flow aiming at the session request according to a verification result and a pre-configured control strategy. Optionally, if the user determines whether to allow the session to be established according to the verification result and the pre-configured control policy, the called party displays a ringing interface, and displays the verification result and the trusted identity information of the calling party obtained according to the trusted identity certificate of the calling party on the ringing interface; in the ringing interface, the user may take actions such as allowing the session to be established or denying the session to be established.
Optionally, the trusted identity credential includes trusted identity information and a public key of the calling party user; the communication token comprises a signature of the information in the communication token by using a private key of a calling party.
Optionally, the SIP protocol is used for session initialization, and the communication token can be embedded into an INVITE message of the SIP protocol to be delivered to the called party.
Optionally, the communication token may be delivered to the called party by short message.
Optionally, the communication token is transferred to the called party, and the method is that the calling party uploads the communication token to the cloud server, and then the called party queries and obtains the communication token from the cloud server.
In order to solve the above technical problem, a second technical solution adopted in the embodiments of the present invention is as follows:
a system for trusted identity authentication in a communication session, comprising:
a client and a server; the client is defined as a calling party or a called party according to the initiation or acceptance of a session in communication; a user registers at a server through a client and acquires a trusted identity certificate;
the calling party client sends a session initialization request in communication, generates a communication token for the session at the same time, and transmits the communication token to the called party client; and the called party client acquires the communication token and the credible identity certificate of the calling party after receiving the session initialization request, then verifies the communication token by using the credible identity certificate, and determines a subsequent processing flow aiming at the session request according to a verification result and a pre-configured control strategy.
Optionally, comprising: if the user is required to decide whether to allow the session to be established according to the verification result and the pre-configured control strategy, the called party client displays a ringing interface, and displays the verification result and the calling party credible identity information obtained according to the calling party credible identity certificate on the ringing interface; in the ringing interface, the user may take actions such as allowing the session to be established or denying the session to be established.
Optionally, the calling party client sends a session initiation request by using an SIP protocol, the communication token is embedded into an INVITE message of the SIP protocol and is transmitted to the called party client, and the called party client obtains the communication token from the INVITE message.
Optionally, the calling party client uploads the communication token to the server, and then the called party client queries and obtains the communication token from the server.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention discloses a credible identity authentication technology in a communication session, wherein in the process of user calling, a communication terminal of a calling party can generate a communication token signed by a user private key, a communication terminal of a called party can verify the communication token, and credible identity information of the calling party is displayed on a ringing interface.
Drawings
FIG. 1 illustrates a method for trusted identity authentication in a communication session in accordance with the present invention;
fig. 2 is a schematic diagram of communication authentication according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of communication authentication according to embodiment 2 of the present invention;
FIG. 4 is a system architecture of the present invention.
Detailed Description
In order that those skilled in the art can understand and implement the present invention, the following embodiments of the present invention will be further described with reference to the accompanying drawings.
Fig. 1 shows a trusted identity authentication method in a communication session, including the steps of:
step 11: the calling party has a credible identity certificate issued by an authority organization;
step 12: a calling party initiates a session request to a called party, generates a communication token for the session at the same time, and transmits the communication token to the called party;
step 13: the called party receives a session request of the calling party, obtains a communication token associated with the session, and further obtains a trusted identity certificate of the calling party;
step 14: the called party verifies the credible identity certificate of the calling party, verifies the communication token by using the credible identity certificate of the calling party, and then determines a subsequent processing flow aiming at the session request according to a verification result and a pre-configured control strategy.
In the invention, the calling party/called party can be two parties of communication contacts such as sending image-text messages, making calls, language calls, video calls and the like.
Wherein the communication token may:
embedded in the SIP protocol to the called party user agent (e.g., (i) embedded in the SIP protocol as a header to the called party user agent or (ii) embedded in the SIP protocol as a message content to the called party user agent); thirdly, short messages can be delivered to the called user agent; the calling party uploads the communication token to the cloud server, and then the communication token is inquired and obtained by the called party from the cloud server (for example, the communication token is transmitted to the called party user agent by adopting an out-of-band channel).
The following concrete treatment methods are listed as follows:
example 1: SIP-based communication authentication process
When the calling party terminal sends the INVITE message to the proxy, the communication token may be carried in the header of the message, and the INVITE message is finally delivered to the called party terminal via a plurality of proxies. The specific flow is as shown in fig. 2:
(1) the calling party generates SIP INVITE messages and calls the communication management service component of the home terminal to initiate a calling process;
(2) the communication management service component of the initiating terminal generates a communication token to be signed;
(3) the communication administration service component of the initiating terminal calls an authentication service signature communication token and puts the signed token into the header of the SIP INVITE message;
(4) SIP INVITE messages carrying communication tokens reach the receiving end communication administration service component through a plurality of proxy servers;
(5) the receiving end communication administration service component extracts the communication token from the SIP INVITE message and calls a verification service to verify the communication token;
(6) the verification service downloads the credible identity certificate of the calling party from the online certificate base according to the relevant fields in the communication token;
(7) the verification service verifies the validity of the identity certificate of the calling party, verifies the validity of the communication token and returns a verification result to the communication administration service component of the receiving end;
(8) and the receiving end communication administration service assembly processes the call according to a preset rule and displays a verification result and a ringing interface to the called party.
Example 2: communication authentication process based on out-of-band channel
When a calling party terminal initiates a call, the generated communication token is transmitted to a called party through an out-of-band channel, and the specific flow is as shown in fig. 3:
after a calling party initiates a call, an initiating terminal communication administration service assembly produces a communication token and calls an authentication service signature, and the signed communication token is put into a call positioning service on the cloud. The receiving-end communication administration service component invokes a validation service to validate the calling party as the call is delivered to the called party via the telephone network. The verification service acquires the communication token from the call positioning service according to the telephone numbers of the calling party and the called party, downloads the trusted identity certificate of the calling party from the online certificate bank according to the relevant fields in the communication token, verifies the validity of the identity certificate of the calling party and verifies the validity of the communication token by using the identity certificate, and replies the verification result to the receiving end communication management component. And the receiving end communication administration service assembly processes the call according to a preset rule and displays a verification result and a ringing interface to the called party.
In the above embodiments, among other things, the communication governance service component achieves the anti-harassment, anti-fraud goal by generating and verifying communication tokens. Communication governance service components, an authentication module, a verification module, a certificate library, call positioning services and the like involved in the communication governance process can be placed at different nodes according to different use scenes during actual deployment.
Referring to fig. 4, the present invention provides a trusted identity authentication system in communication session, including: a client and a server; the client is defined as a calling party or a called party according to the sending or receiving of the message in the communication; a user registers at a server through a client and acquires a trusted identity certificate;
the calling party client sends a session initialization request by adopting an SIP protocol in communication, and simultaneously generates a communication token for the session, and the communication token is embedded into an INVITE message of the SIP protocol and is transmitted to a called party client; and after receiving the session initialization request, the called party client acquires a communication token from the INVITE message, downloads the trusted identity certificate of the calling party from the online certificate library according to the relevant field in the communication token, then verifies the communication token by using the trusted identity certificate, and determines the subsequent processing flow aiming at the session request according to the verification result and the pre-configured control strategy.
Wherein, include: if the user is required to decide whether to allow the session to be established according to the verification result and the pre-configured control strategy, the called party client displays a ringing interface, and displays the verification result and the calling party credible identity information obtained according to the calling party credible identity certificate on the ringing interface; in the ringing interface, the user may take actions such as allowing the session to be established or denying the session to be established.
In the system of the present invention, the client can be realized as an APP on the user mobile terminal, or as a module on the communication gateway, or as an independent gateway device.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (3)
1. A method for trusted identity authentication in a communication session, comprising:
a) the calling party client has a credible identity certificate issued by an authority organization;
b) a calling party client initiates a session request to a called party, simultaneously generates a communication token for the session, and transmits the communication token to the called party; the calling party client terminal adopts the SIP protocol when the session is initialized, and the communication token is embedded into the head part of the INVITE message of the SIP protocol and is transmitted to the called party client terminal;
c) the called party client receives the session request of the calling party, extracts the communication token from the SIP INVITE message, obtains the communication token associated with the session, and further obtains the credible identity certificate of the calling party; downloading the credible identity certificate of the calling party from an online certificate library according to the relevant fields in the communication token;
d) the called party client verifies the credible identity certificate of the calling party client, verifies the communication token by using the credible identity certificate of the calling party, and then determines a subsequent processing flow aiming at the session request according to a verification result and a pre-configured control strategy;
the trusted identity certificate comprises trusted identity information and a public key of a calling party user; the communication token comprises a signature of information in the communication token by using a private key of a calling party; if the user is required to decide whether to allow the session to be established according to the verification result and the pre-configured control strategy, the called party displays a ringing interface and displays the verification result and the credible identity information of the calling party obtained according to the credible identity certificate of the calling party on the ringing interface; on the ringing interface, the user can take actions to allow session establishment or deny session establishment; and the calling party client can upload the communication token to the cloud service, and then the called party client queries and acquires the communication token from the cloud service.
2. A system for authenticating a trusted identity in a communication session, for use by a method for authenticating a trusted identity in a communication session according to claim 1, comprising: a client and a server; the client is defined as a calling party or a called party according to the initiation or acceptance of a session in communication; a user registers at a server through a client and acquires a trusted identity certificate;
the calling party client sends a session initialization request in communication, generates a communication token for the session at the same time, and transmits the communication token to the called party client; the calling party client terminal adopts the SIP protocol when the session is initialized, and the communication token is embedded into the head part of the INVITE message of the SIP protocol and is transmitted to the called party client terminal; after receiving the session initialization request, the called party client extracts a communication token from the SIP INVITE message, acquires the communication token, acquires a trusted identity certificate of the calling party client, then verifies the communication token by using the trusted identity certificate, and determines a subsequent processing flow aiming at the session request according to a verification result and a pre-configured control strategy;
the trusted identity certificate comprises trusted identity information and a public key of a calling party user;
the communication token comprises a signature of information in the communication token by using a private key of a calling party;
if the user is required to decide whether to allow the session to be established according to the verification result and the pre-configured control strategy, the called party displays a ringing interface and displays the verification result and the credible identity information of the calling party obtained according to the credible identity certificate of the calling party on the ringing interface; on the ringing interface, the user can take actions to allow session establishment or deny session establishment; and the calling party client can upload the communication token to the cloud service, and then the called party client queries and acquires the communication token from the cloud service.
3. The system of claim 2, comprising: if the user is required to decide whether to allow the session to be established according to the verification result and the pre-configured control strategy, the called party client displays a ringing interface, and displays the verification result and the calling party credible identity information obtained according to the calling party credible identity certificate on the ringing interface; in the ringing interface, the user may take actions such as allowing the session to be established or denying the session to be established.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112422751B (en) * | 2020-10-27 | 2021-10-26 | 中国科学院大学 | Calling method and system for displaying calling party multimedia identity based on called party |
| CN112929339B (en) * | 2021-01-21 | 2022-08-19 | 艾迪通证技术(北京)有限公司 | Message transmitting method for protecting privacy |
| CN113839784B (en) * | 2021-09-27 | 2023-07-28 | 微位（深圳）网络科技有限公司 | Secure call method and device, electronic equipment and storage medium |
| CN113993126B (en) * | 2021-10-27 | 2023-07-07 | 微位（深圳）网络科技有限公司 | Called terminal interface pulling method, device, equipment and storage medium |
| CN114125158A (en) * | 2021-11-19 | 2022-03-01 | 微位（深圳）网络科技有限公司 | Anti-harassment method, device, equipment and storage medium based on trusted telephone |
| CN114785519A (en) * | 2022-04-08 | 2022-07-22 | 微位（深圳）网络科技有限公司 | Signature and verification method, device, equipment and medium for telephone call behavior |
| CN115102756A (en) * | 2022-06-20 | 2022-09-23 | 上海磐御网络科技有限公司 | Calling subscriber identity authentication technology based on password token |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102037701A (en) * | 2008-04-30 | 2011-04-27 | Nec欧洲有限公司 | Method and system for verifying the identity of a communication partner |
| CN104935758A (en) * | 2014-12-31 | 2015-09-23 | 天地融科技股份有限公司 | Calling method, calling device and system |
| CN106102053A (en) * | 2016-05-25 | 2016-11-09 | 天津光电安辰信息技术有限公司 | A kind of implementation method of voice communication authentication based on the close algorithm of state |
| CN108235314A (en) * | 2016-12-09 | 2018-06-29 | 中国电信股份有限公司 | Identity identifying method, device and system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7240366B2 (en) * | 2002-05-17 | 2007-07-03 | Microsoft Corporation | End-to-end authentication of session initiation protocol messages using certificates |
| US6842449B2 (en) * | 2002-07-09 | 2005-01-11 | Verisign, Inc. | Method and system for registering and automatically retrieving digital-certificates in voice over internet protocol (VOIP) communications |
| US8683044B2 (en) * | 2005-03-16 | 2014-03-25 | Vonage Network Llc | Third party call control application program interface |
| EP2334110B1 (en) * | 2009-12-14 | 2019-07-03 | BlackBerry Limited | Authenticating voice calls from mobile devices |
| US9736130B1 (en) * | 2013-07-05 | 2017-08-15 | Sonus Networks, Inc. | Communications methods and apparatus related to web initiated sessions |
| US10447481B2 (en) * | 2016-03-14 | 2019-10-15 | Arizona Board Of Regents On Behalf Of Arizona State University | Systems and methods for authenticating caller identity and call request header information for outbound telephony communications |
| US10341485B1 (en) * | 2018-05-16 | 2019-07-02 | Fmr Llc | Caller identity and authentication service |
-
2020
- 2020-03-12 CN CN202010173188.5A patent/CN111371797B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102037701A (en) * | 2008-04-30 | 2011-04-27 | Nec欧洲有限公司 | Method and system for verifying the identity of a communication partner |
| CN104935758A (en) * | 2014-12-31 | 2015-09-23 | 天地融科技股份有限公司 | Calling method, calling device and system |
| CN106102053A (en) * | 2016-05-25 | 2016-11-09 | 天津光电安辰信息技术有限公司 | A kind of implementation method of voice communication authentication based on the close algorithm of state |
| CN108235314A (en) * | 2016-12-09 | 2018-06-29 | 中国电信股份有限公司 | Identity identifying method, device and system |
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