International Association
for Cryptologic Research

Algebraic Constructions of Extremal Graph Theory were efficiently used for the construction of Low Density Parity Check Codes for satellite communication, constructions of stream ciphers and Postquantum Protocols of Noncommutative cryptography and corresponding El Gamal type cryptosystems. We shortly observe some results in these applications and present idea of the usage of algebraic graphs for the development of Multivariate Public Keys (MPK). Some MPK schemes are presented at theoretical level, implementation of one of them is discussed.