The important benefit of light weight algorithm are tiny block sizes, tiny key sizes, Simpler rounds, Simpler key schedule as we know Complex key size increase the memory usage , execution delay and the power consumption of implementations; therefore, for many applications like Wireless sensor network lightweight block ciphers use simple key structure that can generate sub-keys. In this paper the performance analysis of Light Weight Cryptographic CLEFIA based on energy consumption is discussed, so for this purpose MSP-EXP430FR5994 Launch Pad Development Kit [25] is used which belongs to MSP430 family, It is the product of Texas Instruments (TI) Company. The CLEFIA algorithm supports 128-bit block size having three different key sizes 128-bit, 192-bit, 256-bits respectively.

Lightweight cryptography, Clelia, key size.