Multilevel re-configurable encryption and decryption algorithm

Abstract

In the existing crypto graphical techniques, to increase the strength of encoding data and to keep the data secured against cryptanalysis, a Multi-Level Encryption algorithm with an Efficient Public Key System is proposed. The Multi-Level encryption steps up the strength of the algorithm by using five keys for encrypting each character, and it makes cryptanalysis impossible without detecting all the five keys. The key generation and distribution method suits the algorithm well, as the purpose of multilevel keys to enhance security step by step is followed while detecting the keys. The proposed algorithm possesses the property of re-configurability in which the logical set of operations performed to encrypt the data can be done in six ways. The keys are not of the static values, and each time a character is encrypted the key value changes, causing intruder getting perplexed. The encrypted data is represented in the patch of color form. © 2011 Springer-Verlag.