Trusted third party
A Trusted Third Party ( TTP ) is a third party that two parties trust. It is only through a third, trustworthy authority that many problems can be solved that arise from the desire for secure transmission of digital data.
TTPs collect evidence of transactions, store them and make them accessible when necessary. In this way, disputes can be settled without prejudice (in the sense of the agreements made beforehand). There are several possible uses for the TTP principle, e.g. B. for key and identity certification, as a time stamping server, evidence holder, data trustee , delivery agent and "executing" organ.
Of course, the use of TTPs assumes that they are extremely well protected against unauthorized access from outside and that their signature keys are kept hidden.