Slack enables two-factor authentication following security breach
Slack has some good security news and some bad security news. First, the bad news: for four days in February, the company suffered a breach of its user database, exposing sensitive information to malicious hackers. No payment information was exposed, so the main concern is user passwords, which were in encrypted form. The encryption makes it hard for attackers to work back to the original passwords, but it’s still an embarrassing breach, and it’s difficult to say for sure that the passwords will never be unencrypted.
Source:: The Verge