Encrypted call method, key management platform, device and medium

By generating encrypted session identifiers and query key serial numbers through the key management platform, the problem of key acquisition failure in encrypted calls is solved, ensuring normal encrypted calls at the terminal and improving communication efficiency and reliability.

CN116709227BActive Publication Date: 2026-06-09CHINA TELECOM CORP LTD TECHNOLOGY INNOVATION CENTER +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA TELECOM CORP LTD TECHNOLOGY INNOVATION CENTER
Filing Date
2023-07-12
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

During an encrypted call, if one party fails to obtain the session key, it cannot decrypt the call data normally. Furthermore, existing technologies require synchronizing the key negotiation status before answering the call, which affects communication efficiency or leads to invalid calls.

Method used

The key management platform generates an encrypted session identifier, queries the called terminal's key and sequence number, and sends it to the calling terminal to conduct an encrypted call, ensuring that the calling terminal uses the first key for encrypted calls. At the same time, after the called terminal is authenticated, the calling terminal's key and sequence number are read and sent to the called terminal to conduct an encrypted call.

Benefits of technology

It enables normal decryption of call data even if one party does not obtain the other party's key, simplifies the key negotiation logic between the network side and the terminal side, and improves call reliability and user experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The disclosure provides a method for encrypted call, a key management platform, an electronic device and a computer readable storage medium, and relates to the technical field of encrypted call. The method comprises the following steps: receiving a calling request authentication and authorization sent by a calling terminal, wherein the calling request authentication and authorization comprises a calling terminal number, a called terminal number and an authentication parameter; authenticating the calling terminal according to the calling request authentication and authorization; generating an encrypted session identifier associated with the calling terminal and the called terminal after the calling terminal authentication is passed; obtaining a first key of the called terminal and a serial number of the first key by querying; and sending the encrypted session identifier, the first key and the serial number of the first key to the calling terminal, so that the calling terminal uses the first key for encrypted call. The method provided by the embodiment of the disclosure can ensure that the calling terminal realizes normal encrypted call.
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