The following table shows the Authentication Mechanisms that require and don’t require usernames and passwords.
| Authentication Mechanism | Mechanism Parameter | Logon Encryption | Data Encryption | Username | Password |
|---|---|---|---|---|---|
| TD0 | Never | No | No | Must | Must |
| TD1 | Never | Yes | No | Must | Must |
| TD2 | Never | Yes | Yes | Must | Must |
| KRB5 | Optional | Yes | Yes | Never | Never |
| KRB5C | Optional | Yes | No | Never | Never |
| NTLM | Optional | Yes | Yes | Never | Never |
| NTLMC | Optional | Yes | No | Never | Never |
| LDAP | Must | Yes | Yes | Never | Never |