Allows the identity of agents to be established.
The key functions for a this service are:
- support for the creation and management and revoking of user IDs
 
- support for the secure authentication of users
 
Standards and specifications with applicability 
to this area are:
- OKI Authentication OSID
 
- Lightweight Directory Access Protocol (LDAP)
 
- Public Key Infrastructure (PKI)
 
- X509
 
Related services are: