Now-a-days, large number of internet and wireless communication users has led to an increasing demand of security measures and devices for protecting the user data transmitted over the unsecured network so that unauthorized persons cannot access it. As they share the data through wireless network it should provide data confidentiality, integrity and authentication. The symmetric block cipher plays a major role in the bulk data encryption. Advanced Encryption Standard (AES) provides data security. AES has the advantage of being implemented in both hardware and software. Hardware implementation of the AES has lot of advantage such has increased throughput and better security level.