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In this paper, we first propose a novel common subexpression elimination (CSE) algorithm for matrix-vector multiplications over characteristic-2 fields. As opposed to previously proposed CSE algorithms, which usually focus on complexity savings due to recurrences of subexpressions, our CSE algorithm achieves two types of complexity reductions, differential savings and recurrence savings, by taking...
Efficient hardware implementation of the advanced encryption standard (AES) is important due to its widespread applications. Applying a novel common subexpression elimination (CSE) algorithm to the two major transformations of the AES, mixcolumns and subbytes, we propose compact designs of the transformations. The hardware costs of our implementations are either the same as or smaller than those of...
We evaluate the performance of two types of erasure coding schemes for broadcasting small files over erasure channels with low bandwidth. One type is based on maximal distance separable (MDS) codes, while the other type uses low-density parity-check codes. The channel model is relevant to a variety of applications, such as the bootstrapping phase of a wireless sensor network. Our results show that...
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