Abstract:
Computer security is an important field of study for
most day-to-day transactions. Cryptography standards are
needed to create interoperability in the transformation security
world. Cryptography mechanism is based on the secret key
(symmetric) and public-key(asymmetric) . This paper presents
the implementation of information security system using RC4
and Blowfish and compares the performance of stream cipher
and Black cipher with variable key length. It also investigates
the performance and time consuming of RC4 and Blowfish
symmetric key algorithms. A user can encrypt and decrypt
several types of files such as text, image and sound files. When
comparing the performance of two symmetric algorithms, RC4
is faster than Blowfish.
