Hybrid Encryption Technique using Cyclic Bit Shift and RC4

Encryption and decryption are critical security measures that are designed to ensure that communication is received and processed correctly. In computer networks, digital information such as text, audio and video have been broadly exchanging over the communication system. Encryption is the process by which a readable message is converted to an unreadable form to prevent unauthorized parties from reading it. Decryption is the process of converting an encrypted message back to its original (readable) format. The original message is called the plaintext message. The encrypted message is called the cipher text message. The security of the communication system in the present day imperative conception because the information ingredient of the human life. There are many Techniques to encrypt and decrypt the information; in this work we proposed combination of two techniques into a hybrid technique to get stronger encryption. The proposed permutation technique is cyclic bit shift, while the proposed stream technique is RC4. The results of the combination of two methods are then performed performance tests using the avalanche effect (AE), bit error ratio (BER), the time required for decryption encryption and character error rate (CER). The Hybrid Encryption Technique using Cyclic Bit Shift and RC4 comes under the category of Symmetric key algorithms. Based on the results of testing the proposed method is superior compared to the method that has been previously proposed.

Keywords: Data security, Decryption, Encryption, Cyclic bit shift, RC4, Stream Cipher, Permutation.