A New Randomness Extraction Paradigm for Hybrid Encryption

E. Kiltz, K. Pietrzak, M Stam, M. Yung

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

69 Citations (Scopus)


We present a new approach to the design of IND-CCA2 secure hybrid encryption schemes in the standard model. Our approach provides an efficient generic transformation from 1-universal to 2-universal hash proof systems. The transformation involves a randomness extractor based on a 4-wise independent hash function as the key derivation function. Our methodology can be instantiated with efficient schemes based on standard intractability assumptions such as Decisional Diffie-Hellman, Quadratic Residuosity, and Paillier’s Decisional Composite Residuosity. Interestingly, our framework also allows to prove IND-CCA2 security of a hybrid version of 1991’s Damgård’s ElGamal public-key encryption scheme under the DDH assumption.
Translated title of the contributionA New Randomness Extraction Paradigm for Hybrid Encryption
Original languageEnglish
Title of host publicationAdvances in Cryptology - EUROCRYPT 2009
PublisherSpringer Berlin Heidelberg
Pages590 - 609
ISBN (Print)9783642010002
Publication statusPublished - 2009

Bibliographical note

Conference Organiser: EUROCRYPT 2009


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