why even signal knocks on google & apple's door 5 June 2026·44 words·1 min Investigations Push-Notifications Privacy Google Apple Fcm Unifiedpush Talks a talk about push notification infrastructure, what google and apple see, why metadata is enough, and what alternatives exist. presented at GPN24.
when your privacy service leaks everything 21 December 2025·981 words·5 mins Investigations Security Responsible-Disclosure Privacy Vibecode Llm found a critical vulnerability in an address-hiding service. every customer’s real address was in the html source.
the zulip saga, part 1: how a messenger sent me down a rabbit hole 17 December 2025·306 words·2 mins Investigations Zulip Push-Notifications Projects Android Open-Source zulip mobile app doesn’t send push notifications reliably. so i built my own notification app and discovered how broken mobile push infrastructure really is.