Chemnitzer-Linuxtage-Nachlese Teil 1:

Das Datenschutz-Problem mit Push-Benachrichtigungen – sehr eindringlich und unterhaltsam erklärt von Merle Fäller

Ich wollte nur Zulip-Notifications auf dem Handy. Also habe ich angefangen, selbst was zu bauen – und bin in ein Rabbit Hole gefallen.
Dieser Vortrag erzählt die Geschichte, wie ich versucht habe, ein Problem zu lösen – und dabei verstanden habe, wie Push-Notifications wirklich funktionieren. Warum mein erster Ansatz nicht skaliert. Warum fast jede App Firebase oder APNs nutzt. Warum selbst Signal bei Google anklopft. Und warum das seit dem Wyden-Brief von 2023 ein dokumentiertes Privacy-Problem ist: »We kill people based on metadata.«
Ich zeige, welche Alternativen es mit UnifiedPush und ntfy gibt, wie ich eine Bridge für Zulip gebaut habe, und warum das gleiche Problem auch für Prometheus-Alerts, Grafana-Notifications und CI/CD-Pipelines gilt. Und was das mit digitaler Souveränität zu tun hat.

https://media.ccc.de/v/clt26-143-warum-selbst-signal-bei-google-und-apple-anklopft

#google #notifications #firebaseCloudMessaging #gcm #firebase #fcn #apple #apn #ntfy #UnifiedPush #zulip #messenger #instantMessenger #clt2026

Warum selbst Signal bei Google und Apple anklopft

media.ccc.de

The history of #AOL #InstantMessenger.

The public interest might be obvious and the developers might be dying to build it, but ultimately, given the chance, corporate greed wins and our best ideas get delayed.

https://mashable.com/archive/aim-history

The Rise and Fall of AIM, the Breakthrough AOL Never Wanted

The Rise and Fall of AIM, the Breakthrough AOL Never Wanted

Mashable
Warum, wozu und wie wir den Instant Messenger „Signal“ vereinsintern seit zehn Jahren nutzen | Computertruhe e. V.

Comparison of Instant Messengers

Comparison of Instant Messengers

@SanskritFritz
@jwildeboer in case of doubt there's this very detailed comparison page of #InstantMessenger programs https://eylenburg.github.io/im_comparison.htm
Comparison of Instant Messengers

Comparison of Instant Messengers

@jwildeboer
Just a serious, genuine question: with the fragmentation of #InstantMessenger alternatives what program do you suggest? #xmpp, #deltachat, #simplex, #Matrix #jami #Briar

@miya Simplex has a lot of the same advantages of signal and is better in some ways

both are floss messengers and have quantum resistant end to end encryption

simplex has multi profile functionality and anonymous invite links so each dm can be like a burner phone with no single user id to connect you to all your dms

simplex is decentralised, while unofficial signal servers cant federate with the official servers simplex is built as a decentralised network of relays that can pass messages to each other for enhanced privacy and ip obfuscation kind of like tor, and its apparently very easy to run a simplex relay bc you dont need a huge media server files and messages are ephemeral its up to end users to archive or back up

Signal was attempted backdoored by the uk govt and was only saved by signal threatening to walk, if simplex is ever compromised or enshittified forks can be made without losing your contacts we aren't totally reliant on the official simplex relays unlike with signal

#FLOSS #InstantMessenger #SimpleX #Signal #QuantumResistantEncryption #Censorship #UnitedKingdom #E2EE #Enshitification

#Signal Should Improve Visualization of Its #Privacy Properties
https://karl-voit.at/2025/10/12/Signal-Privacy-Properties/

This is my proposal on how anybody could check what (meta-)information is known to which communication party when interacting with the #SignalMessenger.

If you already found such an overview, let me know.

#publicvoit #security #instantmessenger

Signal Should Improve Visualization of Its Privacy Properties

Signal Should Improve Visualization of Its Privacy Properties

public voit - Web-page of Karl Voit