Long Wen

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A main contribution of this paper is an improved analysis against HMAC instantiating with reduced Whirlpool. It recovers equivalent keys, which are often denoted as Kin and Kout, of HMAC with 7-round Whirlpool, while the previous best attack can work only for 6 rounds. Our approach is applying the meet-in-the-middle (MITM) attack on AES to recover MAC keys(More)
Group decision-making (GD) is a fuzzy problem with high complexity and is difficult for us to handle. Usually the rule-based Group Decision-making Support System (GDSS) is used to solve the GD problem. But the definitions of the fuzzy rules and membership functions in GDSS are generally affected by subjective decision. So the rationality of GDSS is(More)
LBlock is a 32-round lightweight block cipher with 64-bit block size and 80-bit key. This paper identifies 16-round related-key impossible differentials of LBlock, which are better than the 15-round related-key impossible differentials used in the previous attack. Based on these 16-round related-key impossible differentials, we can attack 23 rounds of(More)
In this study, the influence of the geometric parameters on the optical absorption of gallium arsenide [GaAs] nanowire arrays [NWAs] has been systematically analyzed using finite-difference time-domain simulations. The calculations reveal that the optical absorption is sensitive to the geometric parameters such as diameter [D], length [L], and filling ratio(More)
TWINE is a lightweight block cipher proposed in SAC 2012 by Suzaki et al.. TWINE operates on 64-bit block and supports 80 or 128-bit key, denoted as TWINE-80 and TWINE-128 respectively. TWINE has attracted some attention since its publication and its security has been analyzed against several cryptanalytic techniques in both single-key and related-key(More)
CAST-256, a first-round AES (Advanced Encryption Standard) candidate, is designed based on CAST-128. It is a 48-round Generalized-Feistel-Network cipher with 128-bit block accepting 128, 160, 192, 224 or 256 bits keys. Its S-boxes are non-surjective with 8-bit input and 32-bit output. Wang et al. identified a 21-round linear approximation and gave a key(More)