Improvement Research Based on Affine Encryption Algorithm

In the scientific development of today, people increasingly realize the importance of information security and secrecy. This greatly promoted the development of cryptology in information security, also it is social fields plays a important role. Therefore, cryptography to become important subject of security and confidentiality of communications. This paper compares traditional and modern cryptography, deeply analyses affine cryptography, and improves it by alphabet extension, block encryption and hash function, enhances the security and application of the algorithm.