ISO TC 171 SC 2 is publishing new extensions and clarifications to PDF 2.0 in support of advanced cryptography.

A commentary on the interoperability of encrypting PDF documents with public-key cryptography.

Identifying the signer’s key in a PDF signature: how does that work?

DARPA will provide seed funding of $1.3M for research and prototyping centered on reinventing the PDF specification and delivering on the benefits of defining file formats using unambiguous machine-readable assets.

Matthias Valvekens explains the difference and respective value of digital signatures vs. MAC-based technology for authenticating PDF files.

Matthias Valvekens, the ISO project leader who led development of ISO 32004, has written a pair of blog posts to explain what ISO 32004 does and does not achieve in leveraging MAC technology for securing encrypted PDF files against tampering.

The MuPDF 1.20.0 release focuses on improving annotations, enhanced form handling, and ease of integration.

The PDF Association has updated IANA’s MIME media types registry for FDF, XFDF, PRC and U3D.

Non-rectangular links are coming to PDF 2.0! This article offers some background to link technology in PDF and discusses the forthcoming Extension to PDF 2.0.

With the publication of ISO/TS 24064 PDF 2.0 now supports three 3D formats: U3D, PRC and STEP.