Chapter 10 Install and System Administration for FortiOS 5.0 : Basic Administration : Administrators : Security Precautions : PKI certificate authentication for administrators
  
PKI certificate authentication for administrators
Public Key Infrastructure (PKI) authentication uses a certificate authentication library that takes a list of peers, peer groups, and user groups and returns authentication successful or denied notifications. Users only need a valid certificate for successful authentication; no username or password is necessary.
To use PKI authentication for an administrator, you must configure the authentication before you create the administrator accounts. To do this you need to:
configure a PKI user
create a PKI user group
configure an administrator to authenticate with a PKI certificate.
See Also
Administrative port settings
Administrator configuration
Administrator profiles
Monitoring administrators