The most rigorous signatures.
The simplest flow.
Inkbak signs PDFs with the same cryptographic standard banks and governments use — and gets out of your way the moment you've dropped the document.
- ◆ AATL-trusted timestamps
- ◆ RFC 3161 anchored
- ◆ No documents stored
- ◆ eIDAS-compatible
Three steps. No accounts to create.
Open inkbak in your browser. Drag any PDF onto the workspace. The unsigned bytes never leave your machine.
Drop your signature image or type your name. Position it anywhere on any page. Inkbak builds the cryptographic signature against the entire document.
Walk away with a PAdES B-LTA PDF. Verifiable in Acrobat. Provable in court. Inkbak keeps nothing.
Most e-signature tools sign your name. Inkbak signs your document.
- — Click-to-sign workflow: your name in a font, applied to a generated overlay.
- — Your document lives on their servers, indexed by their workflow engine.
- — "Audit trail" is a database row they choose to show you.
- — If they go out of business, your signed documents lose their provenance.
- ✓ PKCS#7 detached signature over the PDF bytes themselves.
- ✓ Your document never sits on our servers. Signed bytes go to your Drive.
- ✓ Audit trail is the cryptographic structure inside the PDF. Anyone can verify it.
- ✓ If inkbak disappears tomorrow, your signed documents still validate. Forever.
Every signature inkbak makes is B-LTA. The top tier.
PAdES is the European standard for embedding cryptographic signatures in PDFs. It defines four tiers, each adding a layer of long-term verifiability on top of the previous one. Most signing tools stop at B-T. Inkbak goes all the way to B-LTA on every signature.
PKCS#7 detached signature embedded in the PDF. Proves the document hasn't changed since you signed it.
RFC 3161 timestamp token from a trusted authority, embedded as an unsigned attribute on the signature.
Document Security Store (DSS) embedding the signer and TSA certificate chains plus OCSP revocation responses.
Document Timestamp re-anchoring the entire B-LT structure to a fresh moment in time. Survives the original certificates expiring.
Sign a PDF. Keep it forever.
No account. No setup. Drop a PDF, place your signature, walk away with a cryptographically anchored file.