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--></style></head><body lang=EN-US link="#467886" vlink="#96607D" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'>As of 3 February 2025, ARIN Will Only Support TLS 1.2 and TLS 1.3</span><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:none'> </span><span style='font-size:12.0pt;color:black;mso-ligatures:none'>Cryptographic Features Across All ARIN Services.<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'>Historically, ARIN has allowed the use of a wide range of Secure Socket Layer (SSL) and Transport Layer Security (TLS) algorithms to enable secure, encrypted communication between our customers and services. Currently, ARIN supports TLS 1.2 and TLS 1.3 as well as a subset of the stronger algorithms within TLS 1.0, TLS 1.1, and SSLv3 specifications for publicly available services such as ARIN.net mail, Whois Restful Web Service (Whois-RWS), Registry Data Access Protocol (RDAP), ftp://ftp.arin.net, and Resource Public Key Infrastructure Repository Data Protocol (RRDP). The remainder of ARIN services, including the ARIN website and Registration RESTful Web Service (Reg-RWS), only support TLS 1.2 and TLS 1.3.<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'>ARIN will deprecate the outdated versions of SSL and TLS on 3 February 2025 and begin only using TLS 1.2 and TLS 1.3 protocols across all our services. We are providing six months’ notice of this change to allow customers to ensure that all applicable software supports TLS 1.2 and TLS 1.3 protocols to avoid losing connectivity to ARIN services.</span><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black;mso-ligatures:none'> </span><span style='font-size:12.0pt;color:black;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'>In the future, ARIN may more regularly update cipher suite and algorithm support within our published supported protocols to align with requirements from internal and external audits, security certifications, and community feedback.<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'>Regards,<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:12.0pt;color:black;mso-ligatures:none'>American Registry for Internet Numbers (ARIN)<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>