E-signatures legal compliance overview

Learn about the legal compliance related to digital signatures and certificates.

Adobe trust programs

• AATL (Adobe Approved Trust List): A global network of CAs, TSPs, and timestamp service partners that allows users to verify digital signatures based on the PDF standard seamlessly.
• EUTL (European Union Trusted Lists): These are public lists of TSPs accredited according to the EU eIDAS regulation, offering certificate-based digital IDs and other trust services.

Open standards

• Portable Document Format (PDF): This file format, developed by Adobe, was standardized as ISO 32000 in 2008. It defines signature types and other details influencing signature workflows.
• Cloud Signature Consortium (CSC): An organization that develops standards for cloud-based digital signatures, supporting web and mobile applications.
• OpenID Connect (OIDC): It’s an authentication protocol extending OAuth 2.0. It allows users to leverage a third-party identity provider (IdP) for authentication.
• Public Key Infrastructure (PKI): A system for creating, storing, and distributing digital certificates, used for securely verifying a user's identity and the integrity of a signed document.

Compliance

• Legality kit: The Adobe e-signature legality kit provides information about e-signature laws and regulations worldwide.
• E-signature framework: The Adobe e-signature framework is a publicly available tool designed to help customers analyze the connections between e-signature types, document categories, knowledge of signer (status), and signer identification methods for e-signature use cases (or exceptions). The purpose is to augment existing risk analysis processes, help organizations think critically about e-signature policies, and provide a basis for more productive internal discussions about e-signature policies.  
• Time stamps and Long Term Validity (LTV): Time stamps are crucial for digital signature compliance, locking the signer's identity and document. LTV ensures the validity of the signed agreement beyond the expiration of the signer's certificate.

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