Zacharioudakis E. Methods and tools for increasing the efficiency of distributed systems users identifications

Thesis is dedicated to a problem of increasing of efficiency of distributed systems users identifications by impairsing the risk of illegal access to system resources and by speed up identification. In this work the analysis the factors which affect on efficiency of identification of remote user of integrate systems have been workwed out. The main attention is concentrated to identification performance increase. From the theoretical point of view the best for high degree of safety again illegal access to system resources is zero-knowledge or strikt identification, based on utilization of nonreversable mathematical transformation. In dissertation work proposed for speed up strikt identification to use nonreversable transformation of boolean algebra and Galoise fields algebra. For strikt identification based on nonreversable boolean transformation the three method have been proposed. Fist of them provision utilization special building transformation which formed one output code for groop different input code. Another diveloped method strikt identification implementation by nonrever¬sable boolean transformation are based on using standard hash-algorithms lile SHA or Ripemd-160. Third proposed method for strict identification by using boolean transformation is based on using of standard block ciphers such as AES.