Espresso: A stream cipher for 5G wireless communication systems

Elena Dubrova, Martin Hell
2015 Cryptography and Communications  
The demand for more efficient ciphers is a likely to sharpen with new generation of products and applications. Previous cipher designs typically focused on optimizing only one of the two parameters -hardware size or speed, for a given security level. In this paper, we present a methodology for designing a class of stream ciphers which takes into account both parameters simultaneously. We combine the advantage of the Galois configuration of NLFSRs, short propagation delay, with the advantage of
more » ... he Fibonacci configuration of NLFSRs, which can be analyzed formally. According to our analysis, the presented stream cipher Espresso is the fastest among the ciphers below 1500 GE, including Grain-128 and Trivium.
doi:10.1007/s12095-015-0173-2 fatcat:bqf2lzyojvaovd3h3pwfqu7gwe