Privacy Risks in Push Notification Infrastructure (eff.org)

• Systemic metadata collection via centralized notification gateways.
• Bypassing standard app-level privacy permissions.
• Strategic recommendation for OS-level notification lockdown.

"Push notifications serve as surveillance vectors for OS providers Google and Apple. By routing traffic through centralized servers, these companies gain access to device metadata, user identifiers, and timing data that circumvent app-level privacy protections. This architecture creates a systemic vulnerability where the infrastructure itself facilitates tracking independent of explicit user consent within specific applications. The reliance on these monopolistic notification pipelines constitutes a significant bottleneck for true digital autonomy."