VLSI implementation of an OFB processor for encryption of real-time data

In this paper, the OFB processor, which encrypts real-time data (stream type) on a noisy channel such as satellite communication, is implemented. We design four main blocks, which are Key Interface block, DES block of two-round method, Shift Reg block and Sel discard block necessary for implementation of the OFB processor. These blocks are modeled in VHDL and verified by simulation and synthesis. The proposed OFB processor is designed in full-custom by 0.6 mm Hyun Dai fabrication using the IDEC-C631 library.