Author(s)

HUN-CHEN CHEN, JUI-CHENG YEN, CHIEN-WAN HUN & MING-FUNG HWANG

Abstract

In this paper, a new cryptography system is proposed, which combines the methods of position permutation 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 verified strictly. Except for passing the entire coding guideline check and 100% code coverage, with the 0.18 um cell library, all the configurations of architecture are synthesized and verified for speed, area, and power consumption as well as delivering the essential scripts. Regarding verification of all configurations, 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 benefit for most of applications in multimedia system.

Keywords

Decryption, encryption, multimedia system, parameterized VLSI