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: 0) by Anonymous Coward on Friday December 11 2015, @06:08PM
Why would they? You don't actually think corporations care about you do you?
(Score: 2) by Nollij on Friday December 11 2015, @09:49PM
Care about us? Of course not.
But I would think they care about themselves, and that breach was expensive. $67 million of expensive [nbcnews.com]