A Visual Crypotography Scheme Based on Permutation and Combination

Visual Cryptography Technology is a kind of arisen information security encryption technology in recent years.Since 1994,Naor and Shamir put forward that at European Association for Cryptologic,many studies tend to increase the encryption step,and as well make the ncryption scheme complicated.In order to put forward a kind of simple and effective encryption method,this paper introduces the Naor and Shamir visual password basic thought,and analyzed outreach,this paper presents a scheme based on permutation and combination principle,fundamental matrix struct' selection according to the different of the number of black pixels 1.This algorithm is simple and feasible,easy to operate,and also has practical significance.