An ID-based signcryption scheme with compartmented secret sharing for unsigncryption
We extend an ID based signcryption scheme to a compartmented scheme. Our scheme allows any member of a compartment to participate in unsigncryption. The security of this scheme is just as strong as the original. Much of the setup work is naturally parallelizable. It is applicable to modern situations and lends itself easily to implementation.
signcryption compartmented secret sharing cryptography digital signature bilinear maps