RT - Journal Article T1 - Jump Index in T-functions for designing a new basic structure of stream ciphers JF - isc-monadi YR - 2016 JO - isc-monadi VO - 5 IS - 1 UR - http://monadi.isc.org.ir/article-1-75-en.html SP - 21 EP - 32 K1 - T-function K1 - Jump index K1 - Stream cipher K1 - great period AB - The stream ciphers are set of symmetric cipher algorithms that receive the secret message as a sequence of bits and process encrypted operation using complex function according to key, IV and XOR combination of a sequence of bits. One of the goals in the design of stream ciphers is to get minimum great period using one of the primary T-functions. Also using jump index in designing LFSRs lead to complexity of stream ciphers based on LFSR analysis. In this paper, tried with using of T-functions concepts and jump index, a novel method presented for primary functions design with great period. LA eng UL http://monadi.isc.org.ir/article-1-75-en.html M3 ER -