Cryptographic process for e.g. message encryption and decryption, involves scanning bits of preset value from left to right in loop, and calculating and storing partial updated result equal to exponentiation in accumulator

摘要

The process involves scanning bits of a preset value from left to right in a loop indicated by a preset integer varying in a predetermined range. A partial updated result equal to exponentiation is calculated and stored in an accumulator. Result of multiplication of content in the accumulator with a function number in a register is stored in the accumulator for realizing modular exponentiation.