2021-09-29 @Matthias Valvekens
FOSDEM 2021 talk: Document security and digital signatures in PDF
Last February, I gave a talk on PDF’s security features at FOSDEM ’21. The session was recorded, and is embedded below. This was my first talk at a non-maths conference; take that as you will.
2021-09-22 @Matthias Valvekens
PDF As She Is Wrote #1: How are signers identified?
This is the first installment in PDF as She Is Wrote . With this post, I intend to start a series on the way the PDF standards (mainly ISO 32000-x) are implemented in the “real world”. The focus is on implementation behaviour, not the minutiae of what the standard says (or should say), although I’ll occasionally comment on that as well. Given my area of interest, a significant portion of the content will relate to digital signing in some way.