zxcvbn: Public Low-Budget Password Strength Estimation (2017)

Here’s the Dropbox paper[0] and presentation(YouTube)[1] on zxcvbn from the 2016 USENIX security conference:

[0] https://www.usenix.org/system/files/conference/usenixsecurit...

[1] https://youtube.com/watch?v=vf37jh3dV2I&feature=shares

BitWarden has a web tool that lets users securely use zxcvbn to test password strength: https://bitwarden.com/password-strength/