Twitter has published a notice in its blog online today (via iMore) stating that it has discovered some suspicious activity. Upon investigation it was revealed that some American companies had their accounts and passwords compromised. Up to 250,000 accounts were left vulnerable, so Twitter took action.
This week, we detected unusual access patterns that led to us identifying unauthorized access attempts to Twitter user data. We discovered one live attack and were able to shut it down in process moments later. However, our investigation has thus far indicated that the attackers may have had access to limited user information – usernames, email addresses, session tokens and encrypted/saltedversions of passwords – for approximately 250,000 users.
As a precautionary security measure, we have reset passwords and revoked session tokens for these accounts. If your account was one of them, you will have recently received (or will shortly) an email from us at the address associated with your Twitter account notifying you that you will need to create a new password. Your old password will not work when you try to log in to Twitter.
It’s recommended that users change passwords themselves, just as a precaution. If you are worried about your online security in general there are some really great apps out there to help keep your passwords secure, and hard to guess. Personally I use LastPass, but there are others out there like 1Password. Head in to the App Store, there are plenty of options to choose from.