摘要
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 .
This paper introduces the concept of the orthogonal table, discusses the construction of the orthogonal table and its properties, presents formalization definition of (k, n) threshold scheme and describes a new efficient (k, n) threshold scheme based on an orthogonal table. The explicit advantage of this scheme lies in that the sub key has a much shorter size than the master key. Another ability of the scheme makes the number of sub key proportionate to the importance of the user so that it can identify the validity of sub key user and discover the deliberate tampering of the false trustees or the legal trustees.
出处
《华中科技大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2002年第4期52-54,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
关键词
密码学
门限方案
正交表
线性无关列
cryptography
threshold scheme
orthogonal table
linearly independent columns