It began with Amazon's downtime, and has continued with the revelation that Amazon itself was the source of the hack attack that took down Sony. This has caused nervous nellies like Murray Jennex of San Diego State to suggest cloud computing be ignored by the enterprise.
But the problem here isn't the cloud. The problem is identity. A Bloomberg story describes the Amazon sign-up procedure:
Signing up to the service requires a name, e-mail address, password, phone number, billing address and credit card information. Users get an automated call from Amazon and are asked to dial in a four-digit verification code to complete the registration process.
Note what's missing? Proof that you are who you say you are. A hacker can use a stolen identity. He doesn't have to prove he is who he is.