A 23Mb/s 23pJ/b fully synthesized true-random-number generator in 28nm and 65nm CMOS. Yang, K., Fick, D., Henry, M., Lee, Y., Blaauw, D., & Sylvester, D. In 2014 IEEE International Solid-State Circuits Conference (ISSCC), pages 280–281, February, 2014.
doi  abstract   bibtex   
True random number generators (TRNGs) use physical randomness as entropy sources and are heavily used in cryptography and security [1]. Although hardware TRNGs provide excellent randomness, power consumption and design complexity are often high. Previous work has demonstrated TRNGs based on a resistor-amplifier-ADC chain [2], oscillator jitter [1], metastability [3-5] and other device noise [6-7]. However, analog designs suffer from variation and noise, making them difficult to integrate with digital circuits. Recent metastability-based methods [3-5] provide excellent performance but often require careful calibration to remove bias. SiN MOSFETs [6] exploit larger thermal noise but require post-processing to achieve sufficient randomness. An oxide breakdown-based TRNG [7] shows high entropy but suffers from low performance and high energy/bit. Ring oscillator (RO)-based TRNGs offer the advantage of design simplicity, but previous methods using a slow jittery clock to sample a fast clock provide low randomness [1] and are vulnerable to power supply attacks [8]. In addition, the majority of previous methods cannot pass all NIST randomness tests.
@inproceedings{yang_23mb/s_2014,
	title = {A 23Mb/s 23pJ/b fully synthesized true-random-number generator in 28nm and 65nm {CMOS}},
	doi = {10.1109/isscc.2014.6757434},
	abstract = {True random number generators (TRNGs) use physical randomness as entropy sources and are heavily used in cryptography and security [1]. Although hardware TRNGs provide excellent randomness, power consumption and design complexity are often high. Previous work has demonstrated TRNGs based on a resistor-amplifier-ADC chain [2], oscillator jitter [1], metastability [3-5] and other device noise [6-7]. However, analog designs suffer from variation and noise, making them difficult to integrate with digital circuits. Recent metastability-based methods [3-5] provide excellent performance but often require careful calibration to remove bias. SiN MOSFETs [6] exploit larger thermal noise but require post-processing to achieve sufficient randomness. An oxide breakdown-based TRNG [7] shows high entropy but suffers from low performance and high energy/bit. Ring oscillator (RO)-based TRNGs offer the advantage of design simplicity, but previous methods using a slow jittery clock to sample a fast clock provide low randomness [1] and are vulnerable to power supply attacks [8]. In addition, the majority of previous methods cannot pass all NIST randomness tests.},
	booktitle = {2014 {IEEE} {International} {Solid}-{State} {Circuits} {Conference} ({ISSCC})},
	author = {Yang, Kaiyuan and Fick, D. and Henry, M.B. and Lee, Y. and Blaauw, D. and Sylvester, D.},
	month = feb,
	year = {2014},
	pages = {280--281}
}

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