TLS 1.0 and TLS 1.1 (removed)

TLS 1.0 and 1.1 were deprecated in Chrome 72 with a planned removal in Chrome 81 (in early 2020). Other browsers are also removing support for TLS 1.0 and 1.1 at this time. Previously, we showed a deprecation warning in DevTools. In M-79, Chrome marked affected sites as "Not Secure". In M-81, Chrome will show a full page interstitial warning on sites that do not support TLS 1.2 or higher.

TLS 1.2 was published ten years ago to address weaknesses in TLS 1.0 and 1.1 and has enjoyed wide adoption since then. These old versions of TLS rely on MD5 and SHA-1, both now broken, and contain other flaws. TLS 1.0 is no longer PCI-DSS compliant and the TLS working group has adopted a document to deprecate TLS 1.0 and TLS 1.1.

Documentation

• https://security.googleblog.com/2018/10/modernizing-transport-security.html
• https://blog.chromium.org/2019/10/chrome-ui-for-deprecating-legacy-tls.html

Specification

Working draft or equivalent

Status in Chromium

Blink components: Internals>Network>SSL

Removed (tracking bug) in:

• Chrome for desktop release 81
• Chrome for Android release 81

Consensus & Standardization

• Firefox: Public support
• Edge: Public support
• Safari: Public support
• Web Developers: No signals

Owners

• davidben@chromium.org
• cthomp@chromium.org

Last updated on 2020-01-24