BASIC—authentication scheme in which the user name and password are sent in clear-text to the server or proxy.
DIGEST—a challenge-response authentication scheme that uses a server-specified data string for the challenge.
NTLM—a challenge-response authentication scheme that uses the credentials of the user for authentication in a Windows network environment.
NEGOTIATE—also known as the Simple and Protected Negotiation protocol (Snego) is a challenge-response authentication scheme that negotiates with the server or proxy to determine which scheme to use for authentication. Examples are the Kerberos protocol and NTLM.
PASSPORT—a centralized authentication service provided by Microsoft that offers a single logon for member sites.
The following example removes credentials from the job named myDownloadJob.
C:\>bitsadmin /RemoveCredentials myDownloadJob SERVER BASIC