THRESHOLD CLOCK CONTROLLED RANDOM PASSWORD GENERATOR

摘要

The present invention relates to a threshold clock controllable random password generator, which improves a sequence generation speed, and which increases nonlinearity, thereby making malicious password decryption through a correlation attack or the like difficult. The threshold clock controllable random password generator according to the present invention comprises: a clock provision unit which provides clocks; a first linear feed shift register (LFSR) which outputs an output bit based on the clocks provided by the clock provision unit; a second LFSR which outputs an output bit based on the clocks provided by the clock provision unit; a first bit memory which receives and stores a pervious carry value; a second bit memory which receives and stores a previous memory state value; and a calculator which receives the output bits of the first and second LFSRs, and the previous carry value and the previous memory state value stored in the first and second bit memory, generates an output key sequence, a current carry value, and a current memory state value, outputs the output key sequence as a password, and provides the current carry value and the current memory state value to the first and second bit memory. The clock provision unit generates a random number of clocks based on key sequences stored in the first and second LFSRs, and provides the clocks to the first and second LFSRs.