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The Kurosawa-Desmedt Key Encapsulation is not Chosen-Ciphertext Secure
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Abstract: | At CRYPTO 2004, Kurosawa and Desmedt presented a hybrid public-key encryption scheme that is chosen-ciphertext secure in the standard model. Until now it was unknown if the key-encapsulation part of the Kurosawa-Desmedt scheme by itself is still chosen-ciphertext secure or not. In this short note we answer this question to the negative, namely we present a simple chosen-ciphertext attack on the Kurosawa-Desmedt key encapsulation mechanism. |
BibTeX
@misc{eprint-2006-21700, title={The Kurosawa-Desmedt Key Encapsulation is not Chosen-Ciphertext Secure}, booktitle={IACR Eprint archive}, keywords={public-key cryptography / Chosen-ciphertext attack, key encapsulation mechanism}, url={http://eprint.iacr.org/2006/207}, note={ kiltz@cwi.nl 13404 received 21 Jun 2006, last revised 13 Sep 2006}, author={Javier Herranz and Dennis Hofheinz and Eike Kiltz}, year=2006 }