LastPass is a password management service that allows users to centralize all of their collective passwords under one master password. On June 15, 2015, LastPass announced that it was hacked and user data was compromised in the process.
What was stolen from the LastPass database?
LastPass officials released a statement following the attack proclaiming that the hackers did not steal master passwords, but instead gained access to authentication hashes and/or checksums. These are used in order to verify that the master password is correct upon trying to access an account. The attack also compromised cryptographic salts, password reminders, and user email addresses. Officials are confident that LastPass encryption measures ensure the protection of most users and their master passwords. However, it is also possible that fairly weak master passwords, or ones short in length, were also subject to the attack.