The collision-free performance of hash function ensures that the warden can not forge the signatures, so the signature authority of the signer is guaranteed. 哈希函数的无碰撞性使看守不能伪造签名,由此保证签名者的签名权力。
, By use of the TTP, digital signature, encryption and decryption technologies, the system guaranteed the security and reliability of the-e-business trade. 该系统借助可信第三方技术、数字签名和加密等技术,确保电子交易的安全性和可靠性。