Saturation cryptanalysis of CLEFIA
The saturation attack on a novel block cipher CLEFIA,which was proposed in FSE 2007,was reevaluated.The flaws in Shirai et al’s 8 round distinguishers were pointed out and corrected.In order to reduce the number of guessed subkeys,the attack utilized the movement of the whitening key to combine it w...
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| Main Authors: | , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2008-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74654823/ |
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| Summary: | The saturation attack on a novel block cipher CLEFIA,which was proposed in FSE 2007,was reevaluated.The flaws in Shirai et al’s 8 round distinguishers were pointed out and corrected.In order to reduce the number of guessed subkeys,the attack utilized the movement of the whitening key to combine it with subkey,and explored a di-vide-and-conquer strategy.The partial sum technique was adopted to reduce the time complexity.As a result,the satura-tion attack can be extended from 10 round variant without key whitenings to 11 round CLEFIA-128/192/256,and is ap-plicable to 12 round CLEFIA-192/256 and 13 round CLEFIA-256. |
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| ISSN: | 1000-436X |