A key establishment protocol is a protocol whereby a Shared secret becomes available to two or more parties, for subsequent cryptographic applications.
密钥建立协议是为了以后的密码学应用而使一个秘密密钥对两方或更多方都可用的过程。
HMAC can be used with any iterative cryptographic hash function, such as MD5 or SHA-1, in combination with a secret Shared key.
HMAC可以与任何反复式的密码编译杂凑函式(例如MD 5或SHA - 1)一起使用，并与秘密共用金钥组合。
In most available threshold signature schemes, only one group secret key is Shared among a group of signers and the threshold value is fixed.
现有大多数门限签名体制存在一个共同的问题：门限值是固定的，这限制了它们的应用范围。
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