Efficient identity-based key encapsulation to multiple parties

• Published in: Cryptography and Coding pp. 428 - 441
• Main Authors: Barbosa, Manuel, Farshim, P.
• Format: Conference Proceeding Book Chapter
• Language: English
• Published: Berlin, Heidelberg Springer 2005; Springer Berlin Heidelberg
• Series: Lecture Notes in Computer Science
• Subjects: Applied sciences; Computer science; control theory; systems; Cryptography; Exact sciences and technology; Hybrid Encryption; Identity Based Cryptography; Information, signal and communications theory; Key encapsulation mechanism (KEM); Memory and file management (including protection and security); Memory organisation. Data processing; Provable Security; Signal and communications theory; Software; Telecommunications and information theory; Encapsulation; Probabilistic approach; Coding; Public key; Safety; Cryptography; Oracle; Modeling; Diffie Hellman problem
• ISBN: 354030276X; 9783540302766
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/11586821_28

We introduce the concept of identity based key encapsulation to multiple parties (mID-KEM), and define a security model for it. This concept is the identity based analogue of public key KEM to multiple parties. We also analyse possible mID-KEM constructions, and propose an efficient scheme based on bilinear pairings. We prove our scheme secure in the random oracle model under the Gap Bilinear Diffie-Hellman assumption.