Enhancement the security of AES against modern attacks by using variable key block cipher

الملخص EN

In this paper we developed a more powerful algorithm for cryptography.

This algorithm is based on AES to generate different sub keys from the original key and using each sub key to encrypt one AES block we used AES to protect our design from structural analysis, because AES is very resistance to this type of attacks.

From other side generating many keys from symmetric key resists modern attacks on symmetric-key cryptography.

Experimental results are shown in this paper to demonstrate the effectiveness of our design.