Tag: encryption

  • Summer of Code: Small steps

    Yesterday I got my first results encrypting and decrypting OpenPGP messages using PGPainless, my fork of bouncy-gpg. There were some interesting hurdles that I want to discuss though. GnuPG As a first step towards working encryption and decryption, I obviously needed to create some PGP keys for testing purposes. As a regular user of OpenPGP […]

  • Summer of Code: The plan. Act 1: OpenPGP

    OpenPGP OpenPGP (know as RFC4880) defines a format for encrypted and signed data, as well as encryption keys and signatures. My main problem with the specification is, that it is very noisy. The document is 90 pages long and describes every aspect an implementer needs to know about, from how big numbers are stored, over […]

  • Summer of Code: Preparations

    During preparations for my GSoC project, I’m finding first traces left by developers who dealt with OpenPGP before. It seems that Florian was right when he noted, that there is a lack of usable higher level Java libraries as I found out when I stumbled across this piece of code. On the other hand I […]


    Recently there was a lot of news coverage of an alleged „backdoor“ in WhatsApp, the proprietary messaging application owned by Facebook. WhatsApp deployed OpenWhisperSystem’s Signal-protocol roughly a year ago. Now a researcher showed, that WhatsApp’s servers are able to register a new device key for a user, so that messages that the user did not […]