Tindom validates PAdES, XAdES, CAdES, and JAdES signed documents — the four formats that cover virtually every electronically signed document in active use today, from signed PDFs to XML-based government filings, CMS-signed enterprise documents, and JSON-based signatures — against the EU trusted lists, third-country lists recognised under eIDAS, the Swiss and UK trusted lists, and the Adobe Approved Trust List, using a self-hosted engine independent of the platform that created the signature. The result is structured evidence: the qualification level, the signer, the trust chain, and when it was verified, all without relying on a vendor's assurance.
A validation result is a technical object: an ETSI indication, a baseline level, a trust regime, a revocation status. Tindom reports all of it — and then grades it, A+ to F, against a rubric published in full. The grade answers the question an organisation actually has to answer about every incoming document: how strongly does this file prove, on its own, who signed it and that it has not changed — and how long will it keep proving it, without the signing platform?