[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.4134/JKMS.2013.50.2.361

COMPRESS MULTIPLE CIPHERTEXTS USING ELGAMAL ENCRYPTION SCHEMES

Kim, Myungsun (Department of Information Security The University of Suwon)
Kim, Jihye (School of Electrical Engineering Kookmin University)
Cheon, Jung Hee (CHRI & Department of Mathematical Sciences Seoul National University)

Publication Information

Journal of the Korean Mathematical Society / v.50, no.2, 2013 , pp. 361-377 More about this Journal

Abstract

In this work we deal with the problem of how to squeeze multiple ciphertexts without losing original message information. To do so, we formalize the notion of decomposability for public-key encryption and investigate why adding decomposability is challenging. We construct an ElGamal encryption scheme over extension fields, and show that it supports the efficient decomposition. We then analyze security of our scheme under the standard DDH assumption, and evaluate the performance of our construction.

Keywords

ciphertext compression; decomposability; message rate;

Citations & Related Records

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