A CRYPTOGRAPHY SYSTEM AND ITS PARAMETERIZED VLSI GENERATOR FOR REAL-TIME MULTIMEDIA

In this paper, a new cryptography system is proposed, which combines the methods of position per-mutation and value transformation for encryption/decryption. Three good features are involved in this system: (1) High security evaluated with the measure of fractal dimension, (2) Content of encrypted image is sensitive to the initial key, and (3) this system can easily defense against the exhaustive search attack. For the applications with real-time in multimedia system, the parameterized hardware design and its very large-scale integrated circuit (VLSI) generator software are developed. The proposed VLSI generator can be parameterized by the parameters of system-type, packet size, throughput, and security to create proper architecture for the application. All the architectures generated from the VLSI generator have been verifi ed strictly. Except for passing the entire coding guideline check and 100 % code cover-age, with the 0.18 um cell library, all the confi gurations of architecture are synthesized and verifi ed for speed, area, and power consumption as well as delivering the essential scripts. Regarding verifi ca-tion of all confi gurations, the throughput can be ranged between 1.59 and 2.25 Gbps with the hardware cost of 0.54 and 3.92 mm2. Compared with the existing designs, the proposed design possesses wide range of performance and benefi t for most of applications in multimedia system