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This paper proposes and investigates a Chaotic Cipher Block Chaining mode (CCBC) which is to improve the security of a cryptographic algorithm and more resisting cryptanalysis. The size of both block and key are 512-bits. This approach makes the size of key greater than those of the current Data Encryption Standard (DES) and Advanced Encryption Standard (AES). The security analysis process proves...
In this paper, the secure substitution permutation network (SPN) chaos-based cryptosystem is realized in software (C/C++, Altera Quartus II and ModelSim) and implemented in hardware (FPGA platform). The result shows the feasibility and effectiveness of the cryptosystem. As a typical application, the image encryption/decryption is to demonstrate and verify the operation of the cryptosystem hardware.