91e098d3_Infrastructure_services_Page_2__What_it_defines
[Standard] PKINIT [Why it matters] Kerberos identifies users on the network; PKINIT allows Kerberos to use digital certificates on smart cards as credentials [What it defines] 
Emerging standard for using Public keys to log on to networks that use the Kerberos authentication protocol
New in W2K: Public Key Infrastructure services Page 2
What it defines