Alcance
This document specifies how to extend the ISO 32000-2 specification by adding support for the following:— use of the NIST P-curve family of elliptical curves for digital signatures;— use of the Brainpool family of elliptical curves for digital signatures;— use of Edwards Curve (EdDSA) Ed448 and Ed25519 families of elliptical curves for digital signatures.This document does not specify the following:— specific processes for converting paper or electronic documents to the PDF file format;— specific technical design, user interface implementation, or operational details of rendering;— specific physical methods of storing these documents such as media and storage conditions;— methods for validating the conformance of PDF files or PDF processors;— required computer hardware and/or operating system.