Cross-platform PDF digital signing tool. JavaFX desktop UI with drag-to-place visible signatures, PKCS#11/PKCS#12 keystores, RFC 3161 timestamping, OCSP/CRL long-term validation, and a scriptable CLI.

SignServer – Open source, PKI-based signing software to sign code, documents, timestamps and more.

OpenTimestamps Calendar Server

Command output timestamper

A TimeStamp Responder written in C#, which supports both Authenticode and RFC3161

ACL 2018: Dating Documents using Graph Convolution Networks

cryptlib security toolkit

Multi-level Certificate Authority Management tool, front-end tool to OpenSSL, written in bash shell.

The official Apostille Typescript repository

Free software transcription and description application for local and online multimedia content. Moved to Codeberg

plget is a tool used to measure latency packets spent in network stack, NIC driver and on the wire, trace interpacket gap, based as on h/w as on sw timestamping, as for rx as for tx path, measure speed and more ...

Timestamp and colorize the stdout and stderr streams of CLI programs.

Post-Quantum PKI educational demos — Trust the transition to quantum-safe cryptography

timestamping-server-with-digicert-freetsa

Public authorship proof for useful work, reducing ownership uncertainty so more resources go to implementation.

Go client for the OriginStamp API

Open Source solution to generate everlasting blockchain evidence that a file exists at a certain date

Video Time Stamp (VTS)

Prototype smart contract for timestamping service on EOSIO blockchain

Timestamp your WordPress content into the blockchain to empower your content authenticity and increase user trust.