dropbox / dropbox/zxcvbn

Different score for the password strength for the same string between TypeScript and Java versions

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Dominant language
CoffeeScript
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Forks
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Description

Hi.

I'm using **zxcvbn** libraries on back-end and front-end of an app.
For front-end: https://github.com/zxcvbn-ts/zxcvbn
For back-end: https://github.com/nulab/zxcvbn4j

The password strength score returned for the same password string, "**Tiger@0177**" is different for both the libraries. For TS version, it returns 3 (Strong) while for Java version, it returns 2 (Weak), which is giving a very bad UX for my users.

Can you suggest something why is this happening and is there a way to fix this issue? TIA.

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Research direction

Reproduce the reported score difference for "Tiger@0177" using the TypeScript and Java zxcvbn libraries named in the issue. Compare their scoring behavior and inputs to identify the mismatch, then verify that any compatibility change produces the same result in both implementations.

Written by the indexing model from the issue text.

Assessment

Tech stack
coffeescript, java, typescript
Domain
security
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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