Nowadays, advances in technology have led to the expansion of the use and exchange of
digital data, which places great importance on the security of these data. The protection of …

Data security is a major issue because of rapid evolution of data communication over
unsecured internetwork. Here the proposed system is concerned with the problem of …

Cryptography guarantees security in communication through encryption. This paper
proposed a modified Blowfish encryption that uses 128-bit block size and 128-bit key to …

Owing to the growth of high performance network technologies, multimedia applications
over the Internet are increasing exponentially. Applications like video conferencing, video …

This paper applied the high quality speech coding algorithm G. 729 which has been
standardized by ITU-T with low bit rate 8kb/s. This algorithm is based on a conjugate …

Blowfish Algorithm (BA) is a symmetric block cipher that uses Feistel network to iterate
simple encryption and decryption functions. The BA key varies from 32 to 448 bits to ensure …

Yer değiştirme kutuları (Substitution Box, s-box) blok şifreleme algoritmalarında yaygın
olarak kullanılmaktadır. S kutularının kullanılması şifreleme algoritmasını daha güçlü hale …

In this paper, we tried to model parallel version of Data Encryption Standard (DES) by
means of the modified mode of operation. Block size specifications followed by DES have …

The explosive growth of digital information places a high demand for information security.
Information security deals with securing the information from unauthorized access or …

Cryptography guarantees security in communication through encryption. By superimposing
shares in pairs, it is possible to identify any instances of fraud. The hidden picture is …