Cryptology ePrint Archive: Report 2014/651

A note on CCA2-protected McEliece Cryptosystem with a systematic public key

Pavol Zajac

Abstract: We show that the plaintext of some of the proposed CCA2 conversions of McEliece cryptosystem with a public key in systematic form can be recovered faster than with a general linear decoding. This is due to the fact that an attacker only needs to recover a part of the cleartext to decrypt the relevant plaintext.

Category / Keywords: public-key cryptography / cryptanalysis, public-key cryptography, McEliece cryptosystem

Date: received 22 Aug 2014

Contact author: pavol zajac at stuba sk

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Version: 20140827:073822 (All versions of this report)

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