Internet and networks applications are growing very
fast, so the needs to protect such applications are
increased. Encryption algorithms play a main role in
information security systems. On the other side, those
algorithms consume a significant amount of
computing resources such as CPU time, memory, and
battery power. This paper provides evaluation of six of
the most common encryption algorithms namely: AES
(Rijndael), DES, 3DES, RC2, Blowfish, and RC6.
A comparison has been conducted for those
encryption algorithms at different settings for each
algorithm such as different sizes of data blocks,
different data types ,battery power consumption,
different key size and finally encryption/decryption
speed. Simulation results are given to demonstrate the
effectiveness of each algorithm. .