TMAC: Two-Key CBC MAC (Symmetric Cipher) (<Special Section>Cryptography and Information Security)
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概要
- 論文の詳細を見る
In this paper, we propose TMAC. TMAC is a refinement of XCBC such that it requires only two keys while XCBC requires three keys. More precisely, TMAC requires only (k+n)-bit keys while XCBC requires (k+2n)-bit keys, where k is the key length of the underlying block cipher E and n is its block length. We achieve this by using a universal hash function and the cost is almost negligible. Similar to XCBC, the domain is {0,1}^* and it requires no extra invocation of E even if the size of the message is a multiple of n.
- 2004-01-01
著者
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Iwata Tetsu
Department Of Computational Science And Engineering Nagoya University
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Kurosawa Kaoru
Department Of Computer And Information Sciences Ibaraki University
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Kurosawa Kaoru
Department Of Behavioral Sciences Faculty Of Letters Chiba University
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