The θ-vigenere cipher extended to numerical data
G. Nacira, Ayman Abd-ElAziz · 2004
This paper proposes a cipher algorithm of order /spl theta/ using the Vigenere principle. A cipher method with numerical data is used. The cipher depends on the key that is composed by the triple (K, N, /spl theta/) where K is the key, N is a random number. /spl theta/ is the function degree. The recurrent function and the cryptogram depend on the triple. The cipher of a character depends strongly on the degree of encryption, which is a part of the cipher key and, not only on length of key K. To better secure the transfer of data by Vigenere cipher, it is possible to increase the degree. Therefore the proposed algorithm shows that numerical can be transferred to process Vignere cipher.