SHA1 certificates for secure SSL/TLS communications are deprecated due to known computational vulnerabilities. To ensure secure communications, a forced deprecation sounds reasonable (i.e. refuse to connect to these). That has the side effect that it will lock out many users who are unable to use stronger hashes such as SHA256. However, if a fallback to SHA1 is provided (as Facebook is proposing), everyone will be vulnerable to SHA1 downgrade man-in-the-middle attacks.
What to do?
(Score: 3, Funny) by dyingtolive on Friday December 11 2015, @06:09PM
Are... are you really advocating a new version of software as a solution to issues caused by people not upgrading to new versions of software?
Don't blame me, I voted for moose wang!