Which of the following would be the most suitable secure storage solution?

You work as a Database Administrator (DBA) for a company named ABC.com.

The company has a Windows Azure subscription.

The company uses a cloud based SQL Server environment hosted on SQL Azure.

Developers in your company are creating an ecommerce website.

You are designing a database for the website.

The database will be hosted on SQL Azure.

The database will store and reuse web site login details and customer credit card numbers.

You need to ensure the username, passwords and credit card details are securely stored in the database.

Which of the following would be the most suitable secure storage solution?
A . Secure Sockets Layer (SSL)
B . IPSec
C . Data encryption
D . Transparent Data Encryption (TDE)
E . Encrypting File System (EFS)