Dr. Jiri Fridrich and 2Lt Arnold C. Baldoza, USAF, are the Principal Investigators. Improves developed techniques by replacing the algorithmic gray-level modification scheme with diffusion, thus preventing the existence of weak keys.
Diffusion is achieved through applying a nonlinear feedback shift register to a column of pixels.
Diffusion negates the existence of weak ciphering keys. Implements the parallel algorithms on the nCUBE 2S Model 10, a distributed-memory system with processors interconnected in a hypercube configuration. Processors comparable to Intel's 486 processors running at 25 MHz. Achieved ciphering rates sufficient for fast modem transfers, but insufficient for real-time digital video ciphering. Ciphering rates suggests inter-processor communications and data dependencies adversely affect the performance of parallelized algorithms.