PDF glossary
Self-signed certificate
A certificate signed with its own key rather than by a certificate authority: it proves a document is unchanged, but not who the signer is.
Verifying a signature made with a self-signed certificate shows that the document has not changed since it was signed. It does not show that the name in the certificate belongs to the person who signed — no third party has checked it.
In PDF-SDK
The digital ID made on the device is self-signed. Verification reports whether the document changed; it does not judge whether a certificate is trusted.
Verify PDF signaturesLast reviewed