Closed Loop PKI 
 
 
Closed Loop PKI (issued for limited purpose)
- certificates issued for one purpose
 - for use by one application (or group of applications)
 - in a closed (literally or contractually) environment
 - code in limitations in certificate 
 - trust not an issue
 - closed loop PKI pretty much a done deal already
 - authorisation typically separate from identity
 - no major need for revocation
 - no major need for complex Certificate Practice Statements
 
Value of PKI here is flexibility - a security tool