There is a (somewhat) practical version of this implemented as a bookmarklet: http://www.supergenpass.com/ http://www.supergenpass.com/ I used it for years (fo

There is a (somewhat) practical version of this implemented as a bookmarklet: http://www.supergenpass.com/ http://www.supergenpass.com/ I used it for years (for unimportant things) before switching to a password manager. It's technically not secure against a malicious site that sniffs for the existence of the bookmarklet window, but it's a good way to get slightly better security on sites you'd other reuse the same password for.