Warmwasserwerfer Blog

Tag: encryption

Towards OpenPGP v6 in PGPainless

OpenPGP scrambles your messages in a more secure way than this very analog real world example.

I’m very excited to announce the results of what I have been working on for the past 1,5 years. *drumrolls* I added support for OpenPGP v6 (rfc9580) in both Bouncy Castle and PGPainless! In this blog post, I want to go over the work in more details.

August 28, 2025
Use Any SOP Binary With SOP-Java and External-SOP

I just released another library named external-sop, which implements sop-java and allows the user to use any SOP CLI application of their choice from within their Java / Kotlin application!

January 13, 2023
Using Pushdown Automata to verify Packet Sequences

As a software developer, most of my work day is spent working practically by coding and hacking away. Recently though I stumbled across an interesting problem which required another, more theoretical approach…

September 14, 2022
Creating a Web-of-Trust Implementation: Certify Keys with PGPainless

Currently I am working on a Web-of-Trust implementation for the OpenPGP library PGPainless. Technically, the WoT consists of a graph where the nodes are OpenPGP keys (certificates) with User-IDs and the edges are signatures. In order to be able to create a WoT, users need to be able to sign other users certificates to create…

July 19, 2022
PGPainless 1.0.0 Released!

Close to the end of 2021 I’m excited to announce the release of PGPainless version 1.0.0! I feel like it finally reached a state of sufficient maturity to be worthy of a major release with a “1” at the front.

December 30, 2021
Progress on PGPainless Development

Photo by Raphael Koh on Unsplash

Not much time has passed since I last wrote about my progress on the PGPainless library. However, I feel like its time for an update.

July 20, 2021
PGPainless 0.2 Released!

I’m very proud and excited to announce the release of PGPainless version 0.2! Among the major improvements are proper signature verification and a new encryption API.

June 2, 2021
Why Signature Verification in OpenPGP is hard

Signature Verification in OpenPGP is hard. Here is why.

April 3, 2021
PGPainless 0.1.0 released

Photo by Markus Winkler on Unsplash

After two years and a dozen alpha versions I am very glad to announce the first stable release of PGPainless, a library that makes using OpenPGP fun again!

September 1, 2020
OMEMO Specification Sprint

Photo by Sebastian Pena Lambarri on Unsplash

The past weekend some members of the XMPP community gathered in Düsseldorf to work on the next iteration of the OMEMO End to End Encryption Specification. All of us agree that the result – version 0.4 of XEP-0384 – is a huge step forward and better than ever!

March 10, 2020