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1.发明公开A METHOD AND SYSTEM FOR PERFORMING PERMUTATIONS USING PERMUTATION INSTRUCTIONS BASED ON MODIFIED OMEGA AND FLIP STAGES 审中-公开执行置换的方法和系统上使用改进的欧米茄和交换程度基于置换
公开(公告)号：EP1230589A4
公开(公告)日：2008-03-19
申请号：EP01967928
申请日：2001-05-07
申请人： LEE RUBY B
发明人： LEE RUBY B , YANG XIAO
CPC分类号： G06F7/762 , G06F9/30018 , G06F9/30025 , G06F9/30032 , G06F9/30036 , H04L9/0618 , H04L63/04 , H04L63/0428 , H04L63/0435 , H04L2209/122
摘要： The present invention provides permutation instructions which can be used in software executed in a programmable processor (14) for solving permutation problems in cryptography, multimedia and other applications. The permute instructions are based on an omega-flip network comprising at least two stages in which each stage can perform the function of either an omega network stage or a flip network stage. Intermediate sequences of bits are defined that an initial sequence of bits from a source register are transformed into. Each intermediate sequence of bits is used as input to a subsequent permutation instruction. Permutation instructions are determined for permuting the initial source sequence of bits into one or more intermediate sequence of bits until a desired sequence is obtained. The intermediate sequences of bits are determined by configuration bits.
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2.发明公开A METHOD AND SYSTEM FOR PERFORMING PERMUTATIONS USING PERMUTATION INSTRUCTIONS BASED ON MODIFIED OMEGA AND FLIP STAGES 审中-公开执行置换的方法和系统上使用改进的欧米茄和交换程度基于置换
公开(公告)号：EP1230589A2
公开(公告)日：2002-08-14
申请号：EP01967928.1
申请日：2001-05-07
申请人： Lee, Ruby, B.
发明人： LEE, Ruby, B. , YANG, Xiao
IPC分类号： G06F7/38
CPC分类号： G06F7/762 , G06F9/30018 , G06F9/30025 , G06F9/30032 , G06F9/30036 , H04L9/0618 , H04L63/04 , H04L63/0428 , H04L63/0435 , H04L2209/122
摘要： The present invention provides permutation instructions which can be used in software executed in a programmable processor (14) for solving permutation problems in cryptography, multimedia and other applications. The permute instructions are based on an omega-flip network comprising at least two stages in which each stage can perform the function of either an omega network stage or a flip network stage. Intermediate sequences of bits are defined that an initial sequence of bits from a source register are transformed into. Each intermediate sequence of bits is used as input to a subsequent permutation instruction. Permutation instructions are determined for permuting the initial source sequence of bits into one or more intermediate sequence of bits until a desired sequence is obtained. The intermediate sequences of bits are determined by configuration bits.
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