Privacy Preservation Authentication: Group Secret Handshake with Multiple Groups

The technique of group secret handshake (GSH) has been used to help the members affiliated with same in achieving private authentication. After executing GSH protocols, participants can compute a shared key, or generate public encryption key while true self-compute their decryption keys. This paper presents concrete protocol Multiple Groups. Only legitimate member prove that it belongs set affiliations, but which affiliation will not be leaked. Group Authority reveal real identities fellows proposed scheme after analyzing flow communication. provide affiliation-hiding and detectability. In addition, achieves Perfect Forward Secrecy.