Design New Block Cipher Algorithm With New Concept


There are several techniques to safeguard the security of the information stored inthe computers or transmitted by networks; the most powerful tool is encryption.Encryption provides confidentiality for information; additionally encryption can beused to achieve integrity and availability. In this paper we design new Block cipheralgorithm with new concepts that are " encryption keys updating " where this result anew approach not used in all the known block cipher algorithms which is " The samekey, encrypts the same plaintext multiple times and produces different cipher texts ",also user does not inform anything about encryption keys, that giving the proposedalgorithm protection from the cheating of user and the secrecy of the encryption keysremain only in Key Management Center (KMC), finally, this algorithm workapproximately as one-time pad.