Create digital signatures for PDF documents with PHP

SetaPDF-Signer

Digital sign PDF documents with PHP

Sign Encrypted PDF Documents

By default all SetaPDF components are able to read and write protected PDF documents. As of version 2 also signing encrypted/protected PDF documents is possible:

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We use certificates from GlobalSign for demonstration. If you want to validate the signature in a viewer application, make sure that the root certificate is added as a trusted identity.