This page describes the process for adding a time-stamp to a PDF document. This type of digital signature provides evidence that a document existed at a specific time, and that the content of the document has not changed since that time.
This page describes the use of the built-in cryptographic provider with the Pdftools SDK. The built-in provider uses the cryptographic functions of the local operating system and requires no cryptographic hardware or external service.
This page describes the process for digitally certifying a PDF document. This type of signature records the identity of the document author, and allows users to make specific changes to the document, while retaining the validity of the signature.
This page describes the process of how to create a signature with a visual appearance on a page of a PDF. It also describes of how to set a visual appearance to an existing signature field before signing.
This page describes the cryptographic providers supported by the Pdftools SDK.
This page describes how to embed long-term validation information when digitally signing PDF documents using the Pdftools SDK.
This page describes the use of the GlobalSign cryptographic provider with the Pdftools SDK. The GlobalSign provider enables access to the GlobalSign Digital Signing Service to perform cryptographic functions.
This page describes the use of the PKCS#11 cryptographic provider with the Pdftools SDK. The PKCS#11 provider enables access to a cryptographic device using a PKCS#11 driver module such as a HSM, Cloud KMS, or USB token to perform cryptographic functions.
This page describes how to configure HTTPS connections, set up a proxy, and where to store local certificates that may be required when creating digital signatures using the Pdftools SDK.
This page describes the process for digitally signing a PDF document. This type of digital signature records the identity of the signer, and confirms that the content of the document has not changed after the signature was applied.
This page provides an introduction to the secure and sign capabilities of the Pdftools SDK
This page provides a summary of how to sign PDF documents using the Pdftools SDK.
This page describes the use of the Swisscom cryptographic provider with the Pdftools SDK. The Swisscom provider enables access to the Swisscom Signing Service to perform cryptographic functions.
This page describes the use of a time-stamp authority (TSA) to create digital document timestamps using the Pdftools SDK.
This page describes the process for validating the signatures in a digitally signed PDF document. This process confirms the validity of the signing certificate by referencing offline and online sources such as certificates, Online Certificate Status Protocol (OCSP) records and Certificate Revocation List (CRL) records.