dlepex / 7w

7 words. Mnemonic password generator.

Home Page:https://dlepex.github.io/7w

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7w

https://dlepex.github.io/7w

7w is the deterministic password generator. It converts a mnemonic sequence of words into an unreadable & unguessable password. 7w doesn't store or send your data to third party. It is purely browser-side "password calculator".

Implementation notes

  • https://github.com/dlepex/entrop (CLI tool, compiled to WASM) is used to generate a password
    • 7w is just a UI wrapper for entrop
    • use cmdline input to specify/override entrop command line params directly
  • It works only in sufficiently modern browsers that support WASM.
  • Mobile browsers may have some quirks but do work overall
    • Some browsers are slow (in particular for argon2), it is recommended to try some other browser if your current is slow.
    • My tests show that on (some) Android devices Firefox has 2x faster wasm execution than Chrome.
    • You can add 7w to your home-screen (from browser menu), and use it almost as conveniently as a typical mobile app.
    • Disable energy saving mode on mobile device when calculating password (it slows CPU)

Extra params description

Changing any extra parameter will result in getting different password.

  • charset defines characters that a password can contain (entrop: -c)
  • algorithm that is used to generate password (entrop: -a)
  • separator to join words into string, that is then passed to algorithm
  • defaults version defines preset of algorithm parameters such as number of iterations and salt (entrop: -d)

UI tweaks

7w supports URL hash params to change UI

  • w=number - changes number of word inputs (default is 7)
  • mod=v - changes initial mode to visible (default is stealth)

Example: https://dlepex.github.io/7w/index.html#w=10&mod=v

Security hints

  • At least 1 word of sequence should be incorrect i.e. nondictionary
  • You may use the generated string only as a part of your real password (prefix, middle or postfix).
  • Do not use deprecated old algorithms (for backward compat. only)

About

7 words. Mnemonic password generator.

https://dlepex.github.io/7w


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