Design and validation of high speed true random number generators based on prime-length ring oscillators
Liao Ning, Jiang Ding, Bai Chuang , Zou Xuecheng
Acta Metallurgica Sinica(English letters) . 2015, (4): 1 -6 .  DOI: 10.1016/S1005-8885(15)60661-6