ENCRYPTION-DECRYPTION TECHNIQUES FOR PICTURES
Rani Siromoney, K. G. Subramanian, P. J. Abisha · International Journal of Pattern Recognition and Artificial Intelligence · 1989
Language theoretic public key cryptosystems for strings and pictures are discussed. Two methods of constructing public key cryptosystems for the safe transmission or storage of chain code pictures are presented; the first one encrypts a chain code picture as a string and the second one as a two-dimensional array.