Huo, T., X. Meng, W. Wang, C. Hao, P. Zhao, J. Zhai, and M. Li. “Bluethunder: A 2-Level Directional Predictor Based Side-Channel Attack Against SGX”. IACR Transactions on Cryptographic Hardware and Embedded Systems, Vol. 2020, no. 1, Nov. 2019, pp. 321-47, doi:10.13154/tches.v2020.i1.321-347.