VLSI realization of a secure cryptosystem for image encryption and decryption

Chaotic maps have been widely used in data encryption. However, a number of chaos-based algorithms have been shown to be insecure. The application of BB equation for encryption is reported in a recent article. In this paper, new algorithms based on chaos and BB equation are reported for image encryption and decryption. The algorithms are illustrated through an example. For practical use, VLSI architectures of the proposed algorithms are designed and realized using Xilinx ISE VLSI software for hardware implementation. Further, the hardware complexity of the proposed algorithms is compared with the algorithm reported in [6]

[1]  Amr M. Youssef.  A Comment on “Cryptographic Applications of Brahmagupta–Bhãskara Equation” , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[2]  Shujun Li,et al.  Cryptanalysis of a chaotic image encryption method , 2002, 2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353).

[3]  Mohamed I. Sobhy,et al.  Methods of attacking chaotic encryption and countermeasures , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[4]  Miguel Romera,et al.  Cryptanalyzing a discrete-time chaos synchronization secure communication system , 2003, nlin/0311046.

[5]  K. Deergha Rao,et al.  A New and Secure Cryptosystem for Image Encryption and Decryption , 2011 .

[6]  N. Rama Murthy,et al.  Cryptographic applications of Brahmagupta-Bha/spl tilde/skara equation , 2006, IEEE Transactions on Circuits and Systems I: Regular Papers.

[7]  Gonzalo Álvarez,et al.  Known-Plaintext Attack to Two Cryptosystems Based on the BB Equation , 2008, IEEE Transactions on Circuits and Systems II: Express Briefs.

[8]  Jiun-In Guo,et al.  A new chaotic key-based design for image encryption and decryption , 2000, 2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353).

[9]  Shujun Li,et al.  On the security of an image encryption method , 2002, Proceedings. International Conference on Image Processing.

[10]  K. Deergha Rao,et al.  Modified Chaotic Key-Based Algorithm for Image Encryption and its VLSI Realization , 2007, 2007 15th International Conference on Digital Signal Processing.

[11]  N. Rama Murthy,et al.  Cryptographic applications of Brahmagupta-Bhatskara equation. , 2006 .