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引入了正交表的概念 ,讨论了正交表的性质和构造 ,基于正交表建立了一种新的门限方案 .子密钥的长度小于主密钥的长度是这种门限方案的优点 .同时 ,本方案还将每个用户的子密钥数正比于用户的重要性 ,可以辨认子密钥人员的合法性以及有效防止子密钥和主密钥的篡改 .
The concept of orthogonal table is introduced, the properties and construction of orthogonal table are discussed, and a new threshold scheme is established based on orthogonal table.The advantage of this threshold scheme is that the length of sub-key is less than the length of the master key. At the same time, this scheme also compares the number of sub-keys of each user with the importance of users, and can identify the validity of sub-key personnel and effectively prevent the tampering of sub-key and master key.