Chaotic laser based physical random bit streaming system with a computer application interface
This work provides a practical solution for applications requiring reliable random bit generation, such as cryptography or simulations, though it is incremental in improving throughput and quality.
The researchers tackled the problem of generating high-quality physical random bits by developing a system using a chaotic laser as an entropy source, achieving a throughput of up to 4 Gbps and a pass rate of 65% to 75% on the NIST SP800-22 test suite.
We demonstrate a random bit streaming system that uses a chaotic laser as its physical entropy source. By performing real-time bit manipulation for bias reduction, we were able to provide the memory of a personal computer with a constant supply of ready-to-use physical random bits at a throughput of up to 4 Gbps. We pay special attention to the end-to-end entropy source model describing how the entropy from physical sources is converted into bit entropy. We confirmed the statistical quality of the generated random bits by revealing the pass rate of the NIST SP800-22 test suite to be 65 % to 75 %, which is commonly considered acceptable for a reliable random bit generator. We also confirmed the stable operation of our random bit steaming system with long-term bias monitoring.