[20a-A302-1~9] 3.10 Optical quantum physics and technologies

[20a-A302-5] Scalable multibit random number generation using phase noise of chaotic light

〇Yoshihiro Nambu^1,2, Shinichi Yorozu², Yasuhiko Arakawa^1,3 (1.NanoQuine, 2.NEC, 3.IIS Univ. of Tokyo)

Keywords:random number, generation, cryptography

True random number generator is an important building block of practical quantum key distribution. Development of low-cost and high-speed generator is desired. Previously reported high-speed random number generator needs expensive N bit analog to digital conversion circuit in which 2^N-1 comparators run concurrently to generate (M<N) random bits. We proposes a new method for scalable random number generator that needs only M comparators to generate M random bits using phase noise of chaotic light source.