Title :
Information-theoretically secure key-insulated key-agreement
Author :
Seito, Takenobu ; Shikata, Junji
Author_Institution :
Grad. Sch. of Environ. & Inf. Sci., Yokohama Nat. Univ., Yokohama, Japan
Abstract :
In this paper, we study key-agreement which realizes the protection against key-exposure problems in the information-theoretic security setting. And we newly define a model and security notions for information-theoretically secure key-insulated key-agreement (KI-KA for short). In addition, we show tight lower bounds of sizes of entities´ secret-keys required for KI-KA. We also propose constructions of KI-KA which are provably secure and optimal. Furthermore, we provide some applications of KI-KA.
Keywords :
cryptography; telecommunication security; cryptographic schemes; information-theoretic security; lower bounds; secure key-insulated key-agreement; Authentication; Computational modeling; Conferences; Cryptography; Information theory; Polynomials;
Conference_Titel :
Information Theory Workshop (ITW), 2011 IEEE
Conference_Location :
Paraty
Print_ISBN :
978-1-4577-0438-3
DOI :
10.1109/ITW.2011.6089438
