1. Recommendation for cryptographic key generation;Barker;NIST Spec. Publ.,2012
2. A high-speed oscillator-based truly random number source for cryptographic applications on a smart card IC;Bucci;IEEE Trans. Comput.,2003
3. True random number generator based on ROPUF circuit;Buchovecká,2016
4. Bad and good ways of post-processing biased physical random numbers;Dichtl,2007
5. A closer look at security in random number generators design;Fischer,2012