Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : RC4


Encryption VoIP based on Generated Biometric Key for RC4 Algorithm

Raya W. Abd Aljabar; Nidaa F. Hassan

Engineering and Technology Journal, 2021, Volume 39, Issue 1B, Pages 209-221
DOI: 10.30684/etj.v39i1B.1755

Voice over Internet Protocol (VoIP) calls are susceptible to interfere at many points by many attackers, thus encryption considered an important part in keeping VoIP.
In this paper, Encryption VoIP based on Generated Biometric Key for RC4 Algorithm is proposed to encrypt the voice data before transmitting it over the network. The system uses a stream algorithm based on RC4 encryption with the new method of biometrics based Key generation technique. This system has generated complex keys in offline phase which is formed depend on features extracted using Linear Discernment Analysis (LDA) from face images.
The experimental work shows that the proposed system offers secrecy to speech data with voice cipher is unintelligible and the recovered voice has perfect quality with MSR equal to zero and PSNR equal to infinity.

A Modification on Key Stream Generator for RC4 Algorithm

Suhad M. Kareem; Abdul Monem S. Rahma

Engineering and Technology Journal, 2020, Volume 38, Issue 2B, Pages 54-60
DOI: 10.30684/etj.v38i2B.404

Rivest Cipher 4 (RC4) is one of most common stream cipher, but it experience many problem, such as, there is little combination between the plaintext and cipher-text. For this reason RC4 Cipher is vulnerable to a number of attacks. Thereupon, this paper proposes a new modification of the RC4 to strong it. This achieved by modifying key-stream generator based on linear equation with four state tables for generating random numbers. Key control is used for selecting one state table to apply # operation, then performing forward and backward effects to generate the key-stream that used in encryption and decryption. Being evaluated, the results obtained from the statistical probabilities prove that our proposed algorithm is more complex than the standard algorithm by using different key lengths. Also, our proposed RC4 pass the randomness in most metrics in NIST