v4.0.0

Added HMAC (authentication code) of AES cipher text, to prevent tampering.

Note: This is a major release because the Unprotect-Data command will not decrypt ProtectedData objects which were produced by earlier versions of the module and are missing the HMAC code, by default. However, you can add the HMAC to existing objects by using the new Add-ProtectedDataHmac command, at which point Unprotect-Data will work with that object again.

Add-ProtectedDataHmac is not required for any new calls to Protect-Data; the HMAC information will be produced automatically in that case.