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I know that AS (Authentication Server) is a TTP (Trusted Third Party) because it generates keys for two entities (for the client and the TGS).

But what about TGS (Ticket Granting Server)? It also generates keys for two entities (generates for client and server). So is it also TGS a TTP?

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    $\begingroup$ What if it is not TTP? Can you use any service at all? $\endgroup$
    – kelalaka
    Commented Jun 11 at 21:08
  • $\begingroup$ Cross posted with security.se and got answer there. $\endgroup$
    – kelalaka
    Commented Jun 12 at 16:17
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    $\begingroup$ I’m voting to close this question because also asked in security.se and got an answer, there. $\endgroup$
    – kelalaka
    Commented Jun 14 at 15:41

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