Abstract
DEAL is a DES-based block cipher proposed by Knudsen. The block size of DEAL is 128 bits, twice as much as the DES block size. The main result of the current paper is a certificational attack on DEAL- 192, the DEAL variant with a 192-bit key. The attack allows a trade-off between the number of plaintext/ciphertext pairs and the time for the attacker,’s computations. Nevertheless, the DEAL design principle seems to be a useful way of doubling the block size of a given block cipher.
Supported by German Science Foundation (DFG) grant KR1521/3-1.
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L. Knudsen: “DEAL-a 128-bit Block Cipher”, February 21, 1998, revised May 15, 1998: http://www.ii.uib.no/~larsr/aes.html.
J. Kilian, P. Rogaway: “How to Protect DES Against Exhaustive Key Search”, Neal Koblitz (ed.), Advances in Cryptology: Crypto’ 96, Springer LNCS 1109, 252–267, full version online: http://wwwcsif.cs.ucdavis.edu/~rogaway/papers/list.html.
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S. Vaudenay, “On Comparing the Security of Block Ciphers”, manuscript, 1998.
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© 1999 Springer-Verlag Berlin Heidelberg
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Lucks, S. (1999). On the Security of the 128-bit Block Cipher DEAL. In: Knudsen, L. (eds) Fast Software Encryption. FSE 1999. Lecture Notes in Computer Science, vol 1636. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-48519-8_5
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DOI: https://doi.org/10.1007/3-540-48519-8_5
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