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Joined 3 years ago
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Cake day: January 18th, 2021

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  • They had some serious cryptography issues (including no perfect forwards secrecy!!!) but they have promised to fix that. I’ve not yet seen any paper analyzing the new protocol. But maybe it could be good?

    Edit: Here’s a paper with some of the issues: https://www.research-collection.ethz.ch/bitstream/handle/20.500.11850/623004/main.pdf

    They conclude that:

    The seven attacks we have presented highlight fundamental weaknesses in the design of Threema. Indeed, the Threema protocols lack basic properties that are nowadays considered de rigueur for a messenger app to be regarded as secure: forward secrecy with respect to a malicious server, and protection against replay, reflection, and reordering attacks. We believe that the cryptography in Threema has design flaws that need to be addressed in order to meet the security expectations of its users

    They have redesigned their protocol since then but again i have yet to see a third party look at it but TBH i haven’t looked into it.



  • Tipp for people wanting to get into rechargeable AA and AAAs: get IKEA Ladda batteries and their charger. They are cheap and japanese made. Some people argue that they are just relabeled Panasonic eneloops!

    Edit: Oh also if you used rechargeable batteries in the past and you remember them sucking that’s probably true. But the battery chemistry is better now and it’s possible that your batteries degraded quickly because of “dumb” chargers. Modern chargers like the gray 4 battery Ikea charger detect how and for how long to charge and thus will not ruin the batteries.