There are lots of scenarios where you would want to let an untrusted intermediary handle critical operations for you without actually having to build trust with them.
Typical example: Certificate authorities distribute CRLs primarily through untrusted channels and third parties to lower their operating cost. The CRLs are signed so its a win-win for everybody.
Typical example: Certificate authorities distribute CRLs primarily through untrusted channels and third parties to lower their operating cost. The CRLs are signed so its a win-win for everybody.