TY - JOUR AU - Sastry, V.U.K. AU - Janaki, V. PY - 2007 TI - Modified Hill Cipher with Key Dependent Permutation and Circular Rotation JF - Journal of Computer Science VL - 3 IS - 9 DO - 10.3844/jcssp.2007.736.739 UR - https://thescipub.com/abstract/jcssp.2007.736.739 AB - In this study, we have modified the Hill cipher, by including a permutation and circular rotation into the cipher. Here both the permutation and the rotation depend upon the key. From the cryptanalysis and the avalanche effect, discussed in this study, we notice that the strength of the cipher is significant.