Improved meet-in-the-middle attack on Joltik-BC-128
The Joltik-BC, adopting the substitution-permutation network structure and Tweakey framework, was a lightweight tweakable block cipher published at ASIACRPYPT 2014. By researching the internal characteristic of the Joltik-BC, a 6-round meet-in-the-middle distinguisher against the Joltik-BC-128 was c...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
POSTS&TELECOM PRESS Co., LTD
2024-10-01
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| Series: | 网络与信息安全学报 |
| Subjects: | |
| Online Access: | http://www.cjnis.com.cn/thesisDetails#10.11959/j.issn.2096-109x.2024073 |
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| Summary: | The Joltik-BC, adopting the substitution-permutation network structure and Tweakey framework, was a lightweight tweakable block cipher published at ASIACRPYPT 2014. By researching the internal characteristic of the Joltik-BC, a 6-round meet-in-the-middle distinguisher against the Joltik-BC-128 was constructed by controlling the tweakey differentials and combining differential enumeration and differential characteristics of S-boxes. An improved meet-in-the-middle attack against the 9-round Joltik-BC-128 was developed using this distinguisher. The memory and time complexities of the improved 9-round Joltik-BC-128 were 244.91 64-bits blocks and 248 9-round Joltik-BC-128 encryptions. Compared with existing meet-in-the-middle attack results, the time complexity and memory complexity of this method were significantly reduced. |
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| ISSN: | 2096-109X |