A digital ID is a certificate that contains information about you, such as your name, company, and location. It also contains encryption keys used to cryptographically verify that a document was signed with your certificate, making it impossible to forge your signature.

You can obtain a Digital ID from an Certificate Authority (a trusted third party company such as GlobalSign), or you can create your own self-signed certificate in PicoPDF using the Digital ID wizard. However, note that self-signed certificates may not be trusted by the recipient of your signed document, since anyone can create a self-signed certificate.