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Generates unique passwords from website's domain and master passphrase. It uses Nic Wolff's algorithm [see http://angel.net/~nic/passwd.current.html]

This firefox extension allows you to generate site-specific password from a single master password. This avoids the hassle of remembering a unique password for each website you sign up to.

We all have dozens (or even hundreds) of website accounts we have to remember. We are then tempted to reuse the same password for several websites. If one of them is hacked or malevolent, you risk exposing your other accounts.

It mixes together your personal master password and the website domain using a little cryptographic magic we call SHA-1. It will always get the same result if given that domain name and master password, but will never get that result if either changes. (Well, once in a few billion times it might.)