Ken Umeno

Further improving security of Vector Stream Cipher

2017 · Nonlinear Theory and Its Applications IEICE

Vector Stream Cipher (VSC) is a stream cipher which consists of permutation polynomial over a ring of modulo 2w. The algorithm for generating key stream is very simple and the encryption is very fast. Some …

One-stroke polynomials over a ring of modulo $2^w$

2017 · JSIAM Letters

Permutation polynomials over a ring of modulo $2^w$ are well adopted to digital computers and digital signal processors, and so they are in particular expected to be useful for cryptography and pseudo random number generator{s}. …