Computer passwords offer little security to users from identity thieves.

From the New York Times:

I once felt ashamed about failing to follow best practices for password selection — but no more. Computer security experts say that choosing hard-to-guess passwords ultimately brings little security protection. Passwords won’t keep us safe from identity theft, no matter how clever we are in choosing them.

That would be the case even if we had done a better job of listening to instructions. Surveys show that we’ve remained stubbornly fond of perennial favorites like “password,” “123456” and “LetMeIn.” The underlying problem, however, isn’t their simplicity. It’s the log-on procedure itself, in which we land on a Web page, which may or may not be what it says it is, and type in a string of characters to authenticate our identity (or have our password manager insert the expected string on our behalf).

This procedure — which now seems perfectly natural because we’ve been trained to repeat it so much — is a bad idea, one that no security expert whom I reached would defend.

Password-based log-ons are susceptible to being compromised in any number of ways. Consider a single threat, that posed by phishers who trick us into clicking to a site designed to mimic a legitimate one in order to harvest our log-on information. Once we’ve been suckered at one site and our password purloined, it can be tried at other sites.