Information Encryption Scheme Based on Visual Cryptography and Nonlinear Pseudorandom Sequence

Abstract

Security requires the integration of people, process, and technology. Strong information encryption and decryption scheme are crucially important for information technology. Nowadays, secret sharing is one popular method for distributing a secret amongst a group of participants, each of which is allocated a share of the secret. This paper presents a scheme which is derived from the substitution of bits in the image by using nonlinear pseudorandom sequence and visual cryptography method and triple data encryption method. In our method each participant has a unique modified cover image called stego-image. Therefore these participants are required to reconstruct the encrypted secret data without destroying of its secrecy. After that administrator decrypt the original data. Therefore the administrator is the central authority of the process. Experiments show the good quality of the stego-image. The proposed scheme also prevents anyone if steal all the shares will not gaining information about the secret data.