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- W4293842005 abstract "Akleylek et al. [S. Akleylek, L. Emmungil and U. Nuriyev, A mod ified algorithm for peer-to-peer security, journal of Appl. Comput. Math., vol. 6(2), pp.258-264, 2007.], introduced a modified public-key encryption scheme with steganographic approach for security in peer-to-peer (P2P) networks. In this cryptosystem, Akleylek et al. attempt to increase security of the P2P networks by mixing ElGamal cryptosystem with knapsack problem. In this paper, we present a ciphertext-only attack against their system to recover message. In addition, we show that for their scheme completeness property is not holds, and therefore, the receiver cannot uniquely decrypts messages. Furthermore, we also show that this system is not chosen-ciphertext secure, thus the proposed scheme is vulnerable to man-in-the-middle-attack, one of the most pernicious attacks against P2P networks. Therefore, this scheme is not suitable to implement in the P2P networks. We modify this cryptosystem in order to increase its security and efficiency. Our construction is the efficient CCA2-secure variant of the Akleylek et al.'s encryption scheme in the standard model, the de facto security notion for public-key encryption schemes." @default.
- W4293842005 created "2022-08-31" @default.
- W4293842005 creator A5021280221 @default.
- W4293842005 date "2013-02-08" @default.
- W4293842005 modified "2023-09-26" @default.
- W4293842005 title "Cryptanalysis and Improvement of Akleylek et al.'s cryptosystem" @default.
- W4293842005 doi "https://doi.org/10.48550/arxiv.1302.2112" @default.
- W4293842005 hasPublicationYear "2013" @default.
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