Seamlessly Secure Communication Based on the Commutative Encryption
Xianfeng Zhao · Jisuanji gongcheng · 2002
To cross the security gap between 2 or more autonomous domains, an approach based on commutative encryption is proposed. In the new scheme, the proxy connecting the domains does not have to decrypt the input ciphertext by the algorithms used in the departure domain before it can encrypt it by the algorithms used in the destination domain. On the contrary, it can encrypt the input first. Therefore, no plaintext emerges on the way linking the domains. Although most existing cryptosystems do not support the commutative operation, this paper gives an algorithmic implementation based on symmetric stream cipher and Blum-Goldwasser probabilistic public key encryption.