1. Let’s Encrypt Stats - Let’s Encrypt - Free SSL/TLS Certificates,2023
2. QUIC: A UDP-Based Multiplexed and Secure Transport;Iyengar,2021
3. HTTP/3;Bishop,2022
4. w3techs, Historical Trends in the Usage Statistics of Site Elements for Websites, w3techs.com, URL.
5. D. Wagner, B. Schneier, Analysis of the SSL 3.0 Protocol, in: Proc. of USENIX Workshop on Electronic Commerce, 1996.