Blog

eIDAS & validation, in depth

Explainers on electronic signatures, the EU trust framework and what it takes to validate signed documents correctly.

Article6 July 2026

How to validate an ASiC-E container (step by step)

An ASiC-E file is a ZIP with a mimetype entry, a manifest, and an inner XAdES or CAdES signature — what to check, in order, and why CAdES needs one extra hop.

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Article2 July 2026

How to verify a PAdES signature (step by step)

PAdES verification is five checks tied to the signature's baseline level. What each one does, in order, and how to run all five in a single API call.

Explainer1 July 2026

How to validate a digitally signed PDF

A digitally signed PDF carries a PAdES signature. Here is what a validator actually checks — integrity, chain, revocation, and trust — and three ways to run it.

Explainer30 June 2026

EU DSS library vs. hosted validation API: which fits your build?

EU DSS is excellent open-source software. The question is how much plumbing sits between a DocumentValidator call and an answer fit for an auditor.

Guide30 June 2026

The EU Digital Identity Wallet, explained for developers

The EU Digital Identity Wallet lets citizens prove identity and sign documents under eIDAS 2.0 — and why those signatures still need validating.