LIBRARY
Signature standards
What a validator is actually looking at when it opens a signed PDF, and which published specification defines each part of it.
01
Why a level, and not just a signature
A signature that verifies today and cannot be verified in ten years is not a record. The difference between those two outcomes is entirely a question of what was archived into the file at the moment of signing, and that is what the baseline levels describe.
These pages explain public signature specifications in terms of what stops working when a level is absent. They do not claim that OctoDoc currently reaches every level described.
CONTENTS
Everything in this section
Every published page beneath this one, grouped the way the library is organized. Each group states how many pages it holds, so the directory is a map rather than a teaser.
standards
1 page
- What an RFC 3161 time-stamp token proves
A time-stamp token is a third party's signed statement that a particular hash was presented to it before a particular moment. The authority never receives the document, is forbidden from inspecting the hash it is given, and attests existence and sequence rather than authorship, accuracy or agreement.
ABOUT
Who publishes this
These notes are published by OctoDoc, the signing system of record. Upload a PDF or Word file, or choose a reusable PDF form; ask cited questions, prepare fields, send it for signatures, and keep the result in one account.