New related-key rectangle attack on 42-round SHACAL-2
A new 34-round related-key rectangle distinguisher was constructed by exploiting the properties of the round transform of SHACAL-2. Moreover, two new relate-key rectangle attacks on 40-round and 42-round reduced SHACAL-2 were presented by using both the distinguisher and a technique of key-byte gues...
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| Main Authors: | , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2009-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74651994/ |
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| Summary: | A new 34-round related-key rectangle distinguisher was constructed by exploiting the properties of the round transform of SHACAL-2. Moreover, two new relate-key rectangle attacks on 40-round and 42-round reduced SHACAL-2 were presented by using both the distinguisher and a technique of key-byte guessing. It is shown that related-key rectan- gle attacks with only 2 related keys on 40-round and 42-round reduced SHACAL-2 all require data complexity of about 2235 chosen plaintexts and time complexity of about 2432.6 encryptions on 40-round reduced SHACAL-2, and 2472.6 en- cryptions on 42-round reduced SHACAL-2, respectively. The presented results are better than previous published crypt- analytic results on reduced SHACAL-2 in terms of both the data complexity and the time complexity. |
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| ISSN: | 1000-436X |