"Password to Open" Secure?
 

Can anyone enlighten me on the subject of Excel security? Does the Microsoft
Strong Cryptographic Provider provide a reasonable level of security given a
randomly generated 12 char password (including non-alphanumeric chars)? Is
the only method of attack Brute Force?
Also, does internet explorer share the same underlying dll's when encrypting
data for an SSL session.

Any info would be very much appreciated.