Weak cryptographic standards removal notice

In a move to enhance security, GitHub announced the deprecation of several weak cryptographic standards, specifically TLSv1, TLSv1.1, and certain Diffie-Hellman algorithms, with a phased disabling beginning on February 8, 2018, and permanent cessation on February 22, 2018. The transition, affecting web, API, SSH, and git connections, is expected to impact a small fraction of older systems that still rely on the outdated algorithms. To facilitate the transition, GitHub will temporarily disable these algorithms for an hour to prompt updates, granting a two-week grace period for systems to upgrade their cryptographic libraries. Notable affected clients include older versions of Git-Credential-Manager-for-Windows, Git on certain Red Hat releases, and Java releases prior to JDK 8, all of which require updates to ensure compatibility with the newer TLSv1.2 protocol. Users of these systems are advised to update their software to avoid disruptions, with specific guidance provided for Visual Studio users to ensure they receive the necessary updates for continued access to GitHub services.

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