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- W39909032 abstract "Hwang and Chen have proposed a private-key cryptosystem that provides joint error correction, encryption, and “message” integrity. The scheme is based on algebraic error-correcting codes, using random chaining technique. It was shown that obtaining a combinatorially equivalent code, under ciphertext-only attack, requires O(k2n) operations and O(k2n/2) ciphertexts, where n and k are the length and dimension of the code respectively. It was further claimed that obtaining an equivalent code is not sufficient to “totally” break the system. In this paper, a chosen-plaintext attack is presented that is able to break the system, requiring O[(n - k)2k/2] ciphertexts and O[(n - k)2 k] operations; the attack is based on obtaining a combinatorially equivalent code. Finally, a modified version of the scheme is proposed that overcomes the weaknesses of the original Hwang-Chen scheme; the complexity to break this modified scheme is O(k2n/2) ciphertexts and O(kn2n/2) operations." @default.
- W39909032 created "2016-06-24" @default.
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- W39909032 date "1997-01-01" @default.
- W39909032 modified "2023-09-26" @default.
- W39909032 title "Security comments on the Hwang-Chen algebraic-code cryptosystem" @default.
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- W39909032 doi "https://doi.org/10.1007/bfb0028483" @default.
- W39909032 hasPublicationYear "1997" @default.
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