Ryan, Keegan. “Return of the Hidden Number Problem.: A Widespread and Novel Key Extraction Attack on ECDSA and DSA”. IACR Transactions on Cryptographic Hardware and Embedded Systems 2019, no. 1 (November 9, 2018): 146-168. Accessed August 12, 2020. https://tches.iacr.org/index.php/TCHES/article/view/7337.