Knowledgebase
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Digital Signing Setup
Digital Signing Setup
Self signed certificate can be generated via command line like this:
openssl req -x509 -nodes -days 365000 -newkey rsa:2048 -keyout signed.key -out signed.crt
Once you paste it and save, all new generated PDF files will be digitally signed.
Please note that PDF can be validated via Adobe Reader only and certificate should be imported to trusted list before it can automatically validate. Digital signing has little value for a general user and is required by some organizations to prevent file tampering.
For more details about digital signing of PDF.
https://tcpdf.org/examples/example_052/
