A Ubiquitous Processor Embedded with Progressive Cipher Pipelines

A ubiquitous processor, HCgorilla, which has been developed for multimedia mobile use in ubiquitous environment, follows the parallelism of multicore and multiple pipelines. Each of two symmetric cores is composed of Java compatible media pipelines and a cipher pipeline. The cipher pipeline is dedicated for hardware cryptography that implements the progressive scheme of random number addressing achieved by directly connecting a built-in RNG (random number generator) to the address line of data cache. This makes transfer between register file and data cache micro architectural transposition. Compared with other regular cryptography, the SIMD execution by the cipher pipeline has practical ability for ad-hoc network to keep the temporary security of multimedia data without permanent network infrastructure. This paper discusses and justifies the usefulness of HCgorilla in ubiquitous environment, especially focusing on the evaluation of the cipher pipeline in view of cipher strength, hardware cost, power dissipation, clock speed, and throughput.