EtStE: A New Paradigm for Verifiable Signcryption (original) (raw)

Verifiable Composition of Signature and Encryption, 2017

Abstract

The new StE or CtEtS paradigms, proposed earlier, proved to provide very efficient confirmer signatures. Unfortunately, when applied to verifiable signcryption, these paradigms fail to give similar results. The reason lies in the fact that encryptions are produced on the message, to be signcrypted, in addition to other strings (signatures or decommitments), which renders verification ineffective. The subject of this chapter is a new paradigm for verifiable signcryption which combines the merits of the classical paradigms while avoiding their drawbacks.

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