Key exchanging method for end-to-end VoIP encryption communication

Abstract

The invention discloses a key exchanging method for end-to-end VoIP encryption communication. The method comprises the steps that 1), a session initiator generates a session key AK and encrypts the AK through utilization of a public key of a target receiver; 2), an AK ciphertext is added to an INVITE message and the INVITE message is sent to the target receiver; 3), the target receiver decrypts the AK ciphertext through utilization of a private key, thereby obtaining the AK, generates the session key BK and generates a key C as a negotiation key according to the AK and the BK; and 4), after encrypting the BK through utilization of the public key of the initiator, the target receiver sends a BK ciphertext to the initiator through utilization of a 200 OK message, and the initiator decrypts the BK ciphertext through utilization of the private key, thereby obtaining the BK and then generates the key C as the negotiation key according to the AK and the BK. The method is simple and practicable, the influence on a protocol is low, and the key negotiation efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of network communication security, and relates to a key exchange method in IP domain VoIP, in particular to a key exchange method for end-to-end VoIP encrypted communication. Background technique [0002] The rapid development and wide application of mobile communication technology has brought great convenience to people's life, but it also brings many security risks, and illegal communication monitoring often occurs. For this reason, the present invention proposes a method for end-to-end encrypted communication in the IP domain, thereby protecting the security of conversations. [0003] Because symmetric encryption is faster than asymmetric encryption, the delay of encryption and decryption is very short, and the security can be guaranteed enough. At present, symmetric encryption is generally used for encryption and decryption of real-time application data such as voice and multimedia communication. Such a...

AI Technical Summary

Problems solved by technology

The invention proposes a method for exchanging session keys for encrypted VoIP call applications based on the

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