JP4968443B2 - 暗号演算処理方法および暗号演算処理装置 - Google Patents
暗号演算処理方法および暗号演算処理装置 Download PDFInfo
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- JP4968443B2 JP4968443B2 JP2006261251A JP2006261251A JP4968443B2 JP 4968443 B2 JP4968443 B2 JP 4968443B2 JP 2006261251 A JP2006261251 A JP 2006261251A JP 2006261251 A JP2006261251 A JP 2006261251A JP 4968443 B2 JP4968443 B2 JP 4968443B2
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- 238000003672 processing method Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 claims description 41
- 230000000873 masking effect Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 description 13
- 230000009466 transformation Effects 0.000 description 11
- 238000004364 calculation method Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 241000209507 Camellia Species 0.000 description 4
- 235000018597 common camellia Nutrition 0.000 description 4
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- 238000004458 analytical method Methods 0.000 description 1
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Description
数式(1):
数式(3):
次のステップS23は、マスクm用の参照テーブルTを利用して改良型の逆元演算が実行されるステップである。このステップでは、数式9の出力が数式15によって演算される。
2 ICチップ
Claims (4)
- 暗号演算の処理中に逆元演算を行う暗号演算処理装置であって、前記暗号演算処理装置は、
逆元演算される値xをマスクmによって、前記数式(1)で示されるマスク処理する第1の手段と、第1の手段から得られる前記xを前記マスクmでマスク処理した値から、前記数式(2)で示される値yを演算する第2の手段を備えていることを特徴とする暗号演算処理装置。 - 請求項3に記載の暗号演算処理装置において、前記第2の手段は、
前記数式(3)で示される共通マスクm0と前記マスクmとから得られ、前記数式(4)で示される一次元の参照テーブルTとを利用し、前記数式(2)の前記値yを前記数式(5)から求める手段であることを特徴とする暗号演算処理装置。
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JP2006261251A JP4968443B2 (ja) | 2006-01-31 | 2006-09-26 | 暗号演算処理方法および暗号演算処理装置 |
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JP2006261251A JP4968443B2 (ja) | 2006-01-31 | 2006-09-26 | 暗号演算処理方法および暗号演算処理装置 |
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JP2007235913A JP2007235913A (ja) | 2007-09-13 |
JP4968443B2 true JP4968443B2 (ja) | 2012-07-04 |
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JP5242560B2 (ja) * | 2007-05-30 | 2013-07-24 | パナソニック株式会社 | 暗号化装置、復号化装置、暗号化方法及び集積回路 |
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EP1595357A4 (en) * | 2003-02-06 | 2006-03-01 | Discretix Technologies Ltd | DEVICE AND METHOD FOR HANDLING MASKED DATA |
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