PEP3 is a experimental cryptographic system to provide polymorphic encryption and pseudonymisation for large volumes of sensitive data. The system, which is based on PEP, has been designed as part of the P3 project of the VWData program to more securely store the flow records collected by network operators, and help minimise the processing of personal data in this context.

Details about PEP3 can be found this paper, and the system can be seen in action here.