I'd like to encrypt a document securely with MS Word. As far as I know the default encryption algorithm is not secure ("Office 97/2000 Compatible"), and neither XOR encryption. However, there are numerous other to choose from, but i am not sure of the differences. There are "base", "enhanced" and "strong" varieties, but other options too. So which to select, for regular passphrase encryption?
I found this document with some details, but it was not of much help:
Note: this is MS Word 2003, it looks like there are no options for different algorithms in Office 2007, presumably the 2007 defaults are more secure than the 2003 defaults. However, if saving a document in Word 2007 as a 97/2000 compatible document (.doc), which encryption algorithm is selected?