Abstract
Sablier is an authenticated cipher submitted by B. Zhang et al to the CAESAR competition, which is composed of the encryption Sablier v1 and the authentication Au. In this work we first present a state recovery attack against the encryption Sablier v1 with time complexity about 244 operations and data complexity about 24 of 16-bit key words, which is practical in a small workstation. Based on the above attack, we further deduce a key recovery attack and a forgery attack against Sablier. The results show that Sablier is far from the goal of its security design (80-bits security level).
This work was supported by the Natural Science Foundation of China (Grant No. 61121062, 11071285), the 973 Program (Grant No. 2011CB302401).
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Feng, X., Zhang, F. (2014). Cryptanalysis on the Authenticated Cipher Sablier. In: Au, M.H., Carminati, B., Kuo, CC.J. (eds) Network and System Security. NSS 2015. Lecture Notes in Computer Science, vol 8792. Springer, Cham. https://doi.org/10.1007/978-3-319-11698-3_15
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DOI: https://doi.org/10.1007/978-3-319-11698-3_15
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