Combination analysis of ElGamal algorithm and LUC algorithm in file security

Abstract

Cryptography is a science to keep information secure, including encryption process and description. There are four fundamental objectives of cryptography that are aspects of information security: confidentiality, data integrity, authentication and non-repudiation. The ElGamal algorithm is one of the most secure algorithms because it has a high security in algorithm complexity. The ElGamal algorithm gives different ciphertext each the plaintext is encrypted. The LUC algorithm is one of the variants of the asymmetry cryptography algorithm. The LUC algorithm uses two primes to generate public keys and secret keys. The LUC algorithm has much in similarity with the RSA algorithm but in the LUC algorithm the ranks function in RSA is replaced by the Lucas function. Super Encryption is a method of combining between the two algorithms that aims to get a stronger cipher making it very difficult to solve. The result of this study is the process time stated that the average time of plaintext encryption process with 10 characters is 7.33 milisecond while the mean time of plaintext encryption process with 100 characters is 134 milisecond. Then for the average time of encryption process ciphertext with 10 characters is 47,33 milisecond mean time ciphertext encryption process with 100 characters is 186,33 milisecond.