Method and system for realizing cross-domain secure communication

Abstract

The invention discloses a method and a system for realizing cross-domain secure communication, and belongs to the field of secure communication. The method for realizing the cross-domain secure communication is implemented according to the following steps: a system parameter generation phase: a KGC discloses its system parameter params0 and randomly selects a master key s0, and a PKG discloses itssystem parameter params1 and randomly selects a master key s1; a user key generation phase: a partial public key QA and a partial private key DA of a sender are calculated, the sender selects a random number xA, another partial public key PKA and another partial private key A are calculated, and public keys QB and DB of a receiver are generated; a signcryption phase: the sender performs signcryption on a plaintext m to form a signcryption message sigma, and sends the signcryption message sigma to the receiver; and a de-signcryption phase: the receiver obtains the plaintext m by using the signcryption message sigma and the private key DB of the receiver. By adoption of the method and the system for realizing the cross-domain secure communication disclosed by the invention, temporary key security and cross-domain functional characteristics are achieved.

Description

technical field [0001] The invention belongs to the field of secure communication, and in particular relates to a method and system for realizing cross-domain secure communication. Background technique [0002] Security requirements are becoming more and more important in communication networks, and the use of encryption technology is the core of realizing secure communication. Most of the current methods are mainly based on traditional public key cryptosystem, identity-based cryptosystem (IBC, Identity-Based Cryptosystem) and certificateless cryptosystem (CLC, Certificateless Cryptosystem). However, the traditional public key cryptography system has the disadvantage of complicated certificate management. IBC and CLC do not need to use certificates. The public key and the user's private key are calculated by a trusted third party called PKG (Private Key Generator). The core of CLC is that the user's private key is composed of two parts, one part is selected by the user, an...

AI Technical Summary

Problems solved by technology

[0013] Most of the existing secure communication methods based on homogeneous or heterogeneous ciphers cannot resist the security of temporary keys and the defects that different domains use the same password parameters in a cross-domain environment

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