
5/19/2014 · John Graham-Cumming
What this post added
This post details Cloudflare's ongoing efforts to deprecate the RC4 encryption protocol due to its known vulnerabilities. It analyzes the remaining usage of RC4, identifying specific user agents, devices (older phones, browsers like IE 5.01, iCab), and geographic regions where it's still prevalent. The post also highlights the unexpected use of RC4 in transparent SSL proxies within large institutions, explaining the technical reasons behind its continued necessity for certain legacy systems and the challenges in fully deprecating it.