Chord-PKI: Embedding a public key infrastructure into the chord overlay network

Our goal in this paper is to provide authentication, encryption and non-repudiation services for nodes within Peer-to-Peer networks, in an efficient and scalable way. To accomplish this, we propose a distributed Public Key Infrastructure model, suitable for Peer-to-Peer networks and more particularly for the Chord protocol. Our solution integrates the PKI infrastructure within the Chord architecture. We use well known cryptographic techniques as building blocks, such as threshold cryptography and proactive updating.