Generic Constructions of Identity-Based and Certificateless KEMs

Authors:
K. Bentahar;P. Farshim;J. Malone-Lee;N. P. Smart
Affiliations:
University of Bristol, Department of Computer Science, Merchant Venturers Building, Woodland Road, BS8 1UB, Bristol, UK;University of Bristol, Department of Computer Science, Merchant Venturers Building, Woodland Road, BS8 1UB, Bristol, UK;University of Bristol, Department of Computer Science, Merchant Venturers Building, Woodland Road, BS8 1UB, Bristol, UK;University of Bristol, Department of Computer Science, Merchant Venturers Building, Woodland Road, BS8 1UB, Bristol, UK
Venue:
Journal of Cryptology
Year:
2008

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Abstract

We extend the concept of key encapsulation to the primitives of identity-based and certificateless encryption. We show that the natural combination of ID-KEMs or CL-KEMs with data encapsulation mechanisms results in encryption schemes that are secure in a strong sense. In addition, we give generic constructions of ID-KEMs and CL-KEMs that are provably secure in the random oracle model.