发明授权
US06243470B1 Method and apparatus for advanced symmetric key block cipher with variable length key and block
失效
具有可变长度密钥和块的高级对称密钥块密码的方法和装置
- 专利标题： Method and apparatus for advanced symmetric key block cipher with variable length key and block
- 专利标题（中）： 具有可变长度密钥和块的高级对称密钥块密码的方法和装置
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申请号： US09018707申请日： 1998-02-04
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公开(公告)号： US06243470B1公开(公告)日： 2001-06-05
- 发明人: Don Coppersmith , Rosario Gennaro , Shai Halevi , Charanjit S. Jutla , Stephen M. Matyas, Jr. , Mohammed Peyravian , David Robert Safford , Nevenko Zunic
- 申请人： Don Coppersmith , Rosario Gennaro , Shai Halevi , Charanjit S. Jutla , Stephen M. Matyas, Jr. , Mohammed Peyravian , David Robert Safford , Nevenko Zunic
- 主分类号： H04L906
- IPC分类号： H04L906
摘要：
A method and apparatus for an advanced symmetric key cipher for encryption and decryption, using a block cipher algorithm. Different block sizes and key sizes are supported, and a different sub-key is used in each round. Encryption is computed using a variable number of rounds of mixing, permutation, and key-dependent substitution. Decryption uses a variable number of rounds of key-dependent inverse substitution, inverse permutation and inverse mixing. The variable length sub-keys are data-independent, and can be precomputed.
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