[mnw21cam]

Correct horse battery staple. http://xkcd.com/936/

We are told to not re-use passwords. This is not helped by every single shopping web site out there requiring an account (and therefore a password) in order to buy something. Fair enough for big sites like Amazon - I'm actually likely to come back at some time in the future, although I dislike the way it tries to store my card number each time.

On most sites, requiring me to create an account discourages me from shopping there. I'm not likely to come back unless I suddenly have a burning need for another obscure once-in-a-lifetime widget, so why do I need an account? If I do come back, you still only need my card number and a delivery address.

As it stands, the sheer number of accounts that I have means that I invariably set an impossible to remember password and immediately forget it, relying on the password reset mechanism. This is not ideal.

[Pxtl]

Honestly, I just wish I could elect one-factor non-password login on such rarely used sites. Just put a button next to the username box "login by email" and use my email address as my username. So I type in [e-mail] and then click that button, get a link in my email to auth the session cookie, and I'm in. Hard implementation detail would be polling the server from the browser window to find out when I've authed the session from email, since I might want to auth from my phone.

Password reset without the password. If my email account is compromised then everything is screwed, but with password-reset emails that was already true.

Of course, this is potentially vulnerable to abuse... but again, password-reset emails have the same problem.

[hibikir]

Have you seen what modern password hacking tools do? We don't see old school brute force anymore: Things users do are checked first. 3 words one after the other, one or two letters replaced, or sitting, right next to passwords. walking on a keyboard... those things are tested relatively early in the process.

So HorseBatteryStaple sucks as a password, along with anything else you can easily remember. If you want security, you probably want 2 factor authentication and a different password for every site, probably stored in something like a KeePass DB.

[mnw21cam]

Testing several words after each other is an old-school brute force method. How hard a password is to crack is basically a measure of the amount of entropy encoded, and there is more than you think in a collection of several words. The comic uses four words for a reason, not three. Sure, replace a few characters if you wish - it does increase the entropy slightly.

Also, know your target. If your target is to secure your account against a web-based brute force, as depicted in the comic, the attacker is likely to be rate-limited by the server, and a reasonable password is likely to be sufficient. If the attacker gets access to the hashed password database, then that's a different matter, but if you have sufficient entropy in your password it can still be secure.

But my main point is this - why do I need an account and password for uncle bob's glass cutting tool emporium, when I am only likely to make a single order in my lifetime? If I don't have an account, and therefore have no password, then there is nothing to hack.