A Strategy of Encryption and Decryption based in a Low Memory Environment

Abstract

This paper proposes an information encryption and decryption Strategy that can run smoothly in a low memory environment. It divides the information into blocks, which consumes less memory in encryption. And then it adds the identifiers into each block of cipher text. When cipher text is decrypted, it reads identifiers, and divides the cipher text into groups and decrypt it based on the group identifier to obtain the plaintext. In addition, it analyses the root causes of garbled plaintext after decryption, proposes a strategy of increasing cipher text disorder, and provide a method to make a difference between all identifiers and cipher text content. The test results show that the proposed strategy can implement more secure encryption in low memory system than normal strategy, and reduce the memory requirement for encryption and decryption, and increase the complexity of encrypted cipher text. Practices has proved that this strategy can be used in the field of mobile phone encryption and decryption [2], and has certain use value