As far as facebook is concerned, your email is your identification. This is true for other social networks like linkedin, and is slowly catching on to many other Web 2.0 services. It actually makes a lot of sense that your unique identifier (your “ID”) would be your email – it’s unique by definition, it’s easy to remember and most services need the email information anyway (for example, to send you a password reset). So combining the ‘email’ and ‘username’ fields makes a lot of sense.
Unlike in the past where users switched emails frequently, we now have hotmail and gmail and personalized accounts that we can take with us as we switch jobs or ISPs. Email is private (at least, as private as snail mail) and if my bank feels comfortable sending me alerts and other information over email, than it is definitely secure enough for the rest of us.
So if email is destined to become the equivalent of your social security number or identification number (depending on which country you live in) how do we proof check that the email address we typed does not contain any typos? Most identification numbers have a controlling digit that acts like a checksum to make sure the ID was typed correctly. With email, we don’t have that and so you’re sending an email with the newest Vista joke to your coworker friend Bill Howards over at the Vista team and your finger slips and the mail goes to firstname.lastname@example.org.
Or worse – with gmail I’ve been receiving emails that belonged to some other Aviram that was too slow to catch aviram@gmail before I did. Most of this misguided email ranges from boring to funny, but today I got a purchase confirmation with the order number, amount and last 4 digits of the CC number. Since I “own” the email that is associated with this account, what prevents me from logging in to this guy’s account (have the e-commerce site send the password to “my” email due to my temporary amnesia) and redirecting the order to another zip code that happens to be my house?
Sure, I would never do that to a fellow Aviram. But what happens when our possible-future-Internet ID, our email, is typed wrong into some government database and all our IRS information, special Internet-voting code and who-knows-what-else is sent to our alternate identity, the guy that lives right by us on the keyboard? Not good.
My receiving another person’s order information is an obvious lesson for web sites: Make sure you verify the email address. Sending a test email and waiting for confirmation is good security practice since you’re not only confirming the person typed his email address correctly but you’re also confirming he did not sign up his mother in law to your wonderful daily adult joke service as pay back for last thanksgiving.