2009 | OriginalPaper | Buchkapitel
Simple Adaptive Oblivious Transfer without Random Oracle
verfasst von : Kaoru Kurosawa, Ryo Nojima
Erschienen in: Advances in Cryptology – ASIACRYPT 2009
Verlag: Springer Berlin Heidelberg
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Adaptive oblivious transfer (OT) is a two-party protocol which simulates an ideal world such that the sender sends
M
1
, ⋯ ,
M
n
to the trusted third party (TTP), and the receiver receives
$M_{\sigma_i}$
from TTP adaptively for
i
= 1,2, ⋯
k
. This paper shows the first pairing-free
fully simulatable
adaptive OT. It is also the first
fully simulatable
scheme which does not rely on dynamic assumptions. Indeed our scheme holds under the DDH assumption.