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: 2) by edIII on Friday December 11 2015, @08:44PM
In what world is attacking the HVAC system to access internal networks a direct attack? They literally went through the air conditioner to attack Target. SHA1 probably never even applied, but I'm not aware of what exploit they used against it.
Technically, lunchtime is at any moment. It's just a wave function.
(Score: 0) by Anonymous Coward on Saturday December 12 2015, @07:02PM
You're basically supporting my point even though you can't see it. Especially with your "SHA1 probably never even applied," too. Interesting you could see that but not realize what it means in the big picture.