A一对密钥(KA公开,KA秘密),B一对密钥(KB公开,KB秘密),A方向B方发送数字签名M,对信息M加密为:M’= KB公开(KA秘密(M))。B方收到的解密方案是 A. KB公开(KA秘密(M’)) B. KA公开(KA公开(M’)) C. KA公开(KB秘密(M’)) D. KB秘密(KA秘密(M’))
【简答题】Dolphins are mammals, not fish. Can dolphins talk? Maybe they can’t talk as human beings do, but they talk with sounds. They show their with sounds. Dolphins travel in a group. We call a group of fish...