Marine Minier

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Rijndael is one of the ve candidate blockciphers selected by NIST for the nal phase of the AES selection process. The best attack of Rijndael so far is due to the algorithm designers ; this attack is based upon the existence of an eÆcient distinguisher between 3 Rijndael inner rounds and a random permutation, and it is limited to 6 rounds for each of the(More)
Sosemanuk is a new synchronous software-oriented stream cipher, corresponding to Profile 1 of the ECRYPT call for stream cipher primitives. Its key length is variable between 128 and 256 bits. It accommodates a 128-bit initial value. Any key length is claimed to achieve 128-bit security. The Sosemanuk cipher uses both some basic design principles from the(More)
The Feedback with Carry Shift Registers (FCSRs) have been proposed as an alternative to Linear Feedback Shift Registers (LFSRs) for the design of stream ciphers. FCSRs have good statistical properties and they provide a built-in non-linearity. However, two attacks have shown that the current representations of FCSRs can introduce weaknesses in the cipher.(More)
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(More)
Sflash is a fast multivariate signature scheme. Though the first version Sflash was flawed, a second version, Sflash was selected by the Nessie Consortium and was recommended for implementation of low-end smart cards. Very recently, due to the security concern, the designer of Sflash recommended that Sflash should not be used, instead a new version Sflash(More)
For security applications in wireless sensor networks (WSNs), choosing best algorithms in terms of energy-efficiency and of small memory requirements is a real challenge because the sensor networks must be autonomous. In (Eisenbarth et al., 2012; Law et al., 2006), the authors have benchmarked on a dedicated platform some block-ciphers and have deduced the(More)
Feedback with Carry Shift Registers (FCSRs) are a promising alternative to LFSRs in the design of stream cipher. The previous constructions based on FCSRs were dedicated to hardware applications [3]. In this paper, we will describe X-FCSR a family of software oriented stream cipher using FCSRs. The core of the system is composed of two 256-bits FCSRs. We(More)
Knudsen and Rijmen introduced the notion of known-key distinguishers in an effort to view block cipher security from an alternative perspective e.g. a block cipher viewed as a primitive underlying some other cryptographic construction such as a hash function; and applied this new concept to construct a 7-round distinguisher for the AES and a 7-round Feistel(More)