Password Checkup by Google

A Chrome Extension to help resecure hacked accounts

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Password Checkup helps you resecure accounts that were affected by data breaches.

Wherever you sign-in, if you enter a username and password that is no longer safe due to appearing in a data breach known to Google, you’ll receive an alert.

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Amin Afshar
  • Amin Afshar
    Amin AfsharFounder of Sidenote

    Great idea to bring some peace of mind for security.


    Does it really need to be an extension? I think a website would have been sufficient.

    Seems to work instantly. Not sure if this is a good or bad thing.

    Amin Afshar has used this product for one day.


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Hunter Carter
Hunter Carter@school_4_ants
How does it work? Is it sniffing the password and sending to a server? Or is it all client side?
Tony Brix
Tony Brix@tonybrix
@school_4_ants skimming through the source code it looks like they check against a firebase database https://password-api-prod.fireba...
Tony Brix
Tony Brix@tonybrix
@school_4_ants According to Google they use "multiple rounds of hashing, k-anonymity, and private set intersection with blinding" to secure the username/password before sending them to a server.
Ayush Chandra
Ayush Chandra@ayush_chandra · Research Intern & Tech Evangelist
Great job!! 😊 Great move by Google
Miloš Lazarević
Miloš Lazarević@mexes_mexikanac · Maybe . . . Bazzinga ?
Mui interestados
casey mahoney
casey mahoney@casey_mahoney · Created a small business 9 years ago .
To early to tell. Give me a few days and I will have something concrete to say!