Create digital signatures for PDF documents with PHP


Digital sign PDF documents with PHP

Google Cloud KMS Module

This demo shows you the usage of an individual module we created for the Google Cloud Key Management Service (KMS). By using this cloud service it is possible to use private keys stored on a Hardware Security Module (HSM).

This gives you a way to use certificates which are validated through the AATL (Adobe Approved Trust List). While the KMS stores only keys we also created a tool which allows you to create self-signed certificates and/or certificate requests (CSR) with these keys. The tool can be found here.

In this demo we use a certificate for automated PDF signing from .

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The uploaded files are bound to your browser session and are not accessible by any other user. They will get deleted after 24 hours automatically.

Long-Term Validation