Available Technologies

Background

Random number generators are widely used in processors, secure key generation, identification (ID) number creation, and Monte Carlo simulations. True Random Number Generators (TRNGs), which generate values based on naturally occurring and unpredictable phenomena, are known to be more resistant to physical attacks compared to software-based random number generators. However, during the process of converting physical phenomena such as thermal noise into digital values within a TRNG, the randomness can be disrupted. Moreover, TRNGs require countermeasures against characteristic changes caused by factors such as component aging and temperature fluctuations. Furthermore, conventional TRNGs often include complex post-processing circuits to monitor output, provide feedback, and suppress variation. These additional circuits result in increased chip area and higher power consumption.

Description and Advantages

This invention is a physical random number generator comprising two inverter circuits, a latch circuit capable of outputting random data, and a circuit that autonomously cancels out variations to ensure stable operation.

・ Achieves stable operation by autonomously compensating for variation (Fig. 1)
　The probability of outputting a 1 in the standalone circuit of this technology is distributed around 0.5.

 

・ Significant reduction in power consumption (Fig. 2)

    Compared to conventional TRNGs (e.g., Latch w/ calibration), the proposed TRNG (Strong Arm
    Latch) achieves over a 90% reduction in power consumption.