Unfortunately, the PEPP-PT approach will not protect privacy in many European countries. This is because an individual is linked to a phone number. Since you cannot purchase a SIM card in many countries without showing ID (and a copy of your ID is made and sent to the state authorities), the state is easily able to match phone numbers with people’s real identities. Consequently, the authorities will easily be able to track the user’s movements, or at least track what other people that person interacted with over a period of time, which is essentially the same thing.

If you read the PEPP-PT documentation closely, the “privacy protections” are mainly keeping you anonymous to other ordinary people. But people should reasonably want to remain anonymous from the state as well.