Efficient identity based multi-proxy multi-signcryption scheme using bilinear pairings over elliptic curves

Signcryption is a cryptographic primitive that performs both encryption and signature in a single logical step more efficiently than sign-then-encryption approach. Till now various kinds of signcryption schemes have been proposed. In this paper we propose a new identity based multi-proxy multi signcryption scheme from bilinear pairings, which is both public verifiable and forward secure. This scheme is a combination of multi-proxy multi-signature scheme with signcryption scheme. We discuss the security requirements of our new scheme. Finally, we compare our scheme with previous schemes in computational point of view.