Abstract
We improve the existing distinguishers of AES. Our work is mainly built upon the works by Gilbert& Miner [17] and Demirci & Selçuk [14]. We find out that some part of the inner encryption function of AES can be expressed with relatively few constants under certain conditions. These new distinguishers are exploited to develop a meet-in-the-middle attack on 7 rounds of AES-128 and AES-192, and on 8 rounds of AES-256. The proposed attack is faster than the existing attacks [15,17] for key size of 128 at the expense of an increase in the complexities of memory and precomputation.
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Demirci, H., Taşkın, İ., Çoban, M., Baysal, A. (2009). Improved Meet-in-the-Middle Attacks on AES. In: Roy, B., Sendrier, N. (eds) Progress in Cryptology - INDOCRYPT 2009. INDOCRYPT 2009. Lecture Notes in Computer Science, vol 5922. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-10628-6_10
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DOI: https://doi.org/10.1007/978-3-642-10628-6_10
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