WCF Security

Setting the Client Credential Type

Select a client credential type as appropriate. For more information, see Selecting a Credential Type. The following client credential types are available:

• Windows
  
  
• Certificate
  
  
• Digest
  
  
• Basic
  
  
• UserName
  
  
• NTLM
  
  
• IssuedToken

http://msdn.microsoft.com/en-us/library/ms731925.aspx