https://api.portal.trustedservices.intel.com/EPID-attestation
https://www.intel.com/content/www/us/en/developer/tools/software-guard-extensions/request-license.html
https://zhuanlan.zhihu.com/p/100220444?ivk_sa=1024320u
https://community.intel.com/t5/Intel-Software-Guard-Extensions/intel-sgx-commercial-license-issue/td-p/1398644
