Reliably generating good passwords

Passwords are used everywhere in our modern life. Between your email account and your bank card, a lot of critical security infrastructure relies on "something you know", a password. Yet there is little standard documentation on how to generate good passwords. There are some interesting possibilities for doing so; this article will look at what makes a good password and some tools that can be used to generate them.

There is growing concern that our dependence on passwords poses a fundamental security flaw. For example, passwords rely on humans, who can be coerced to reveal secret information. Furthermore, passwords are "replayable": if your password is revealed or stolen, anyone can impersonate you to get access to your most critical assets. Therefore, major organizations are trying to move away from single password authentication. Google, for example, is enforcing two factor authentication for its employees and is considering abandoning passwords on phones as well, although we have yet to see that controversial change implemented.

Yet passwords are still here and are likely to stick around for a long time until we figure out a better alternative. Note that in this article I use the word "password" instead of "PIN" or "passphrase", which all roughly mean the same thing: a small piece of text that users provide to prove their identity.

Antoine Beaupré Reliably generating good passwords

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