Design of TETRA End-to-End Encryption System
TETRA端-端加密系统设计

This paper proposes an end-to-end encryption system with frame stealing technique for voice, and frame insertion for video. Block cipher in output feedback mode is used to implement the end-to-end key stream generator. Moreover, in SDS message encryption, a block cipher in CBC mode is used to calculate the cryptographically secure checksum, which is sufficient to test the integrity.