Rapid Encryption Method based on AES Algorithm for Grey Scale HD Image Encryption

Ciphering is very important operation to preserve the confidentiality of digital images transmitted over public network spatially with rapidly growth in communication techniques. Advanced Encryption Standard (AES) is a famous and strong encryption algorithm which has several advantages in data ciphering. However, AES suffer from some drawbacks such as high computations, pattern in ciphered images, and hardware requirement. Those problems are more complicated when AES algorithm willusefor images ciphering especially the HD images. Some modifications were proposed in this paper to enhance the performance of AES algorithm in terms of time ciphering and pattern appearance. First modification is decreasing the number of rounds to one while the second modification is replace the S-box with new S-box to decrease the hardware requirements. Applying AES in one of the ciphering mode solves the pattern appearance problems. The experimental results indicate that the proposed modifications make AES algorithm faster while fulfill the security requirements.