Security blogger Brian Krebs broke a story this week about a cyber underground identity theft service in the business of selling Social Security numbers, birth records, credit and and background reports. The potential impact of having those details compromised is massive–which is why that information shouldn’t play such a crucial role in establishing or authenticating our online identities. The best approach is to require two-factor authentication–possibly combining knowledge and biometrics– so that it’s not so easy to steal an identity.”]