Signature token

A signature token is the cryptographic object produced at the time of signing that groups together: the document's hash, the time-stamp, the signatory's identifier and the cryptographic signature itself (encrypted with the private key via the PKI). This token is embedded in the final PDF according to the PAdES format and allows any verifier — judge, expert, auditor — to reconstruct the proof of signature without depending on the platform. The token is self-sufficient: even if Certyneo were to disappear, the signature would remain verifiable with a standard PDF reader (Acrobat Reader, pdfsig).