21 citations · 49 across the 17 of their papers we have counts for
4 papers · 1 filter
Further improving security of Vector Stream Cipher
Atsushi Iwasaki, Ken Umeno
Vector Stream Cipher (VSC) is a stream cipher which consists of permutation polynomial over a ring of modulo . The algorithm for generating key stream is very simple and the e…
Repeated Multimarket Contact with Private Monitoring: A Belief-Free Approach
Atsushi Iwasaki, Tadashi Sekiguchi, Shun Yamamoto +1
This paper studies repeated games where two players play multiple duopolistic games simultaneously (multimarket contact). A key assumption is that each player receives a noisy and…
One-stroke polynomials over a ring of modulo
Atsushi Iwasaki, Ken Umeno
Permutation polynomials over a ring of modulo are compatible with digital computers and digital signal processors, and so they are in particular expected to be useful for cry…
Three Theorems on odd degree Chebyshev polynomials and more generalized permutation polynomials over a ring of module
Atsushi Iwasaki, Ken Umeno
Odd degree Chebyshev polynomials over a ring of modulo have two kinds of period. One is an "orbital period". Odd degree Chebyshev polynomials are bijection over the ring. The…