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发明名称
加密保护方法
摘要
一种用于加密演算法之决定性遮掩方法,其系利用钥匙混合与替代(S-箱)运算,该运算系使用对应于每个可能S-箱输入之一真实遮罩与复数个假性遮罩所建构之一遮罩表。将各遮罩应用于此钥匙混合运算(例如,按位元XOR),而将钥匙或回合次钥匙加密,以产生真实与假性钥匙或次钥匙,其可以应用至整个加密演算法中或个别加密回合中之资料区块。此等遮罩值可以防止侧通道统计分析,由此等假性钥匙或次钥匙判断出真实钥匙。该真实遮罩对加密系可以辨识,但无法由外部观察者辨识。
申请公布号
TW200742383
申请公布日期
2007.11.01
申请号
TW095142013
申请日期
2006.11.14
申请人
艾特梅尔公司
发明人
文森 杜帕昆斯;米契尔 道格耶特
分类号
H04L9/06(2006.01)
主分类号
H04L9/06(2006.01)
代理机构
代理人
赖经臣;宿希成
主权项
地址
美国
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