An ID-Based Signcryption Scheme with Compartmented Secret Sharing for Unsigncryption.
Graham Enos, Yuliang Zheng · IACR Cryptology ePrint Archive · 2012
In this paper the ID-based signcryption scheme of Li, Xin, and Hu is extended to a compartmented scheme. If an organization is partitioned into different compartments, this scheme allows any member of a specific compartment to participate in the unsigncryption; moreover, each member of a compartment has information unique to that individual. This construction is the first (to the authors’ knowledge) to combine identitybased encryption, Shamir’s threshold scheme, and signcryption into an implementable compartmented sharing scheme.