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DECIM, a new stream cipher for hardware applications

Decim is a new stream cipher designed for hardware applications with restricted resources. The design of the cipher is based on both a nonlinear filter LFSR and an irregular decimation mechanism recently introduced and called the ABSG. Apart from the security aspects, the design goal is to produce a stream cipher with a compact hardware implementation and operating at high rates. Excluding the tricky case of Time-Memory-Data trade-off attacks, the best attacks that have been identified by the authors are at least as difficult as exhaustive search.