INVOLUTORY MATRIX IN VISUAL CRYPTOGRAPHY
Palanisamy Shanmugam, C. Loganathan · 2011
In Hill cipher encryption, the complexity of finding the inverse of the matrix during decryption is eliminated by adopting self invertible matrices. Authentication of hall tickets for candidates during examination is a complicated issue. By evaluating simultaneously encryption and decryption with details of text, photos and signatures of candidates it is easy to prevent malpractices during examination held at various centres of the institution.