2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164433Voice Service Providers (VSPs) participating in VoIP peering frequently want to withhold their identity and related privacy-sensitive information from other parties during the VoIP communication. A number of existing documents on VoIP privacy exist, but most of them focus on end user privacy. By summarizing and extending existing work, we present a unified privacy mechanism for both VoIP users and service providers. We also show a case study on how VSPs can use this mechanism for identity and topology hiding in VoIP peering.Networking and Internet ArchitectureC.2.1; C.2.2; C.2.3text