Is it "authenticate with" or "authenticate against"?

Generally, a user authenticates to something with something. A user is proving he or she is entitled to access something based on something he or she has. For example,

The user must authenticate to the host with Active Directory credentials.

In more complicated scenarios 'against' might be useful. For example,

The user will be authenticating against the Active Directory's Kerberos server.

The definition of against as "compared or contrasted with" is being used rather than "in opposition to".

The user must authenticate to the host with Active Directory credentials because authentication is against the Kerberos server.

In a way, 'against' is thinking from the server's point of view. A user provides credentials and the server compares them to its user table.

I use Microsoft Manual of Style and couldn't find a recommended style. I use 'to' and 'with' when I'm writing for end-users and I use 'against' when writing for administrators.