Pseudonymisation of SS7 Identifiers by Random Table

Description

This poster presents a method for pseudonymizing SS7 mobile signaling identifiers (e.g. telephone numbers) to protect subscriber privacy and comply with GDPR in our 2G/3G SS7 attack detection project. Sensitive identifiers are replaced via random substitution tables, applied independently to maximize protection with a fast, simple implementation. The process runs at the operator’s premises before data transfer to the research institute, where GDPR compliance is ensured. A Data Protection Impact Assessment (DPIA) details the research context, required data, protections, risks, and mitigations. To our knowledge, no prior publication covers all aspects of real-case SS7 pseudonymization.

Period	28 May 2024
Event title	RMA Poster Session 2024
Event type	Study day
Organiser	Royal Military Academy
Location	Brussels, BelgiumShow on map
Degree of Recognition	RMA