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How can I validate time-sensitive data is coming from a mobile app, and not being forged?

In our application, a user selects answers to questions. Their score is based on the time spent answering each question down to a tenth of a second. The server is responsible for calculating and ...
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OpenTSA and PKCS11

We are planning to implement the time-stamping service(RFC 3161) using OpenTSA wanted to know If OpenTSA supports PKCS-11 (Cryptoki) to talk to HSMs? BTW: I did not find documentation or much ...