In this paper, we present Decim, a stream cipher hardwareoriented selected for the phase 3 of the... more In this paper, we present Decim, a stream cipher hardwareoriented selected for the phase 3 of the ECRYPT stream cipher project eSTREAM. As required by the initial call for hardware-oriented stream cipher contribution, Decim manages 80-bit secret keys and 64-bit public initialization vectors. The design of Decim combines two filtering mechanisms: a nonlinear Boolean filter over a LFSR, followed by an irregular decimation mechanism called the ABSG. Since designers have been invited to demonstrate flexibility of their design by proposing variants that take 128-bit keys, we also present a 128-bit security version of Decim called Decim-128.
Decim-128 is the adaptation example to 128-bit-security of the eSTREAM candidate Decimv2, whose a... more Decim-128 is the adaptation example to 128-bit-security of the eSTREAM candidate Decimv2, whose aim is to prove that the Decimv2 design can easily be adapted to dierent security parameters. This erratum is submitted in order to correct an error in the tap sequence of the ltering function in Decim-128 specications.
In this paper, we present Decim, a stream cipher hardwareoriented selected for the phase 3 of the... more In this paper, we present Decim, a stream cipher hardwareoriented selected for the phase 3 of the ECRYPT stream cipher project eSTREAM. As required by the initial call for hardware-oriented stream cipher contribution, Decim manages 80-bit secret keys and 64-bit public initialization vectors. The design of Decim combines two filtering mechanisms: a nonlinear Boolean filter over a LFSR, followed by an irregular decimation mechanism called the ABSG. Since designers have been invited to demonstrate flexibility of their design by proposing variants that take 128-bit keys, we also present a 128-bit security version of Decim called Decim-128.
Decim-128 is the adaptation example to 128-bit-security of the eSTREAM candidate Decimv2, whose a... more Decim-128 is the adaptation example to 128-bit-security of the eSTREAM candidate Decimv2, whose aim is to prove that the Decimv2 design can easily be adapted to dierent security parameters. This erratum is submitted in order to correct an error in the tap sequence of the ltering function in Decim-128 specications.
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Papers by Herve Sibert