Thawte SGC Knowledgebase Archived 2013-02-03 at archive.today, 3/12/2010 http://www.thawte.com/ssl-digital-certificates/technical-support/sgc/index.html
"Global Server ID Details". Archived from the original on 29 February 2000. https://web.archive.org/web/20000229063811/http://digitalid.verisign.com/server/global/globalDetails.htm
University of Cambridge page on Server Gated Cryptography, 3/12/2010[clarification needed] http://www-uxsup.csx.cam.ac.uk/~jw35/courses/using_https/html/x746.htm
SSLShopper.com "Say No to SGC", 3/12/2010 http://www.sslshopper.com/article-say-no-to-sgc-ssl-certificates.html
Server-Gated Cryptography (SGC) browsers pose security risks, 3/12/2010 https://support.quovadisglobal.com/KB/a100/server-gated-cryptography-sgc-browsers-pose-security-risks.aspx