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Paper: The Kurosawa-Desmedt Key Encapsulation is not Chosen-Ciphertext Secure

Authors:
Javier Herranz
Dennis Hofheinz
Eike Kiltz
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URL: http://eprint.iacr.org/2006/207
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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
}