Hybrid Cryptosystem Algoritma Rabbit Stream dan Enhanced Dual RSA untuk Pengamanan Berkas Digital

Abstract

Cryptography is a technique for encoding data by encrypting plaintext into an unreadable (meaningless) form. Along with the development of the times, agencies tend to use electronic documents for exchanging data because it is very easy and fast. However, in exchanging data, theft often occurs, which makes it less efficient. Therefore, this research was made to provide a solution to this problem by using hybrid cryptography, so this research discusses the Hybrid Cryptosystem Rabbit Stream Algorithm and Enhanced Dual RSA. The Rabbit Stream algorithm is a stream cipher algorithm whose system security depends on generating key bit streams (keystream), while the Enhanced Dual RSA algorithm is an asymmetric variant of RSA whose security lies in the difficulty of factoring large numbers into prime factors. longer in the encryption process when compared to the Rabbit Stream algorithm. In the research process, the Rabbit Stream algorithm is used to encrypt the sender's message, and the Enhanced Dual RSA algorithm will encrypt the key from the Rabbit Stream. The result of the message and key encryption processes will then be sent to the recipient. After the recipient gets the plaintext and key, the key is first decrypted with the Enhanced Dual RSA algorithm so as to produce a key that can decrypt the message using the Rabbit Stream algorithm. The results of the research state that the Hybrid Cryptosystem Rabbit Stream algorithm and the Enhanced Dual RSA algorithm are faster in data processing and more secure because of the layered security of the key.