Estimating the used IPv4 address space with secure multi-party capture-recapture

Many people have data sources of used IPv4 addresses, e.g. server logs or network measurements. However, the challenge when estimating IPv4 address usage is to combine the data sources of multiple collaborators in a secure and efficient way. The number of observed addresses in one source is often not sensitive information, but most people do not want to share datasets of unanonymised IPv4 addresses. We propose using a secure and reasonably efficient protocol that combines the datasets while keeping the addresses of collaborators private. We are also looking for more collaborators willing to share their data under our scheme.