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Shamir门限算法

于 2022-04-21 发布 文件大小:1.16 MB
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门限方案(也称秘密共享或秘密分享)。通常将秘密(比如密钥)被分割成几份,某些份额必须结合在一起才能恢复秘密。Shamir建议了一种可达到理论上无条件保密的密钥分散保存方案,把主密钥按下列方法分为W个子密钥K1、K2、… 、KW,并把子密钥分发给W个有合法权力的人,并做到:1.用W个子密钥中的任意t个计算主密钥K容易;2.用W个子密钥中的任意少于t个确定主密钥理论上不可解的问题,因为缺少信息。

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