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arXiv · 2202.03002

Partial Encryption after Encoding for Security and Reliability in Data Systems

Alejandro Cohen·Rafael G. L. D'Oliveira·Ken R. Duffy·Muriel Médard
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Abstract

We consider the problem of secure and reliable communication over a noisy multipath network. Previous work considering a noiseless version of our problem proposed a hybrid universal network coding cryptosystem (HUNCC). By combining an information-theoretically secure encoder together with partial encryption, HUNCC is able to obtain security guarantees, even in the presence of an all-observing eavesdropper. In this paper, we propose a version of HUNCC for noisy channels (N-HUNCC). This modification requires four main novelties. First, we present a network coding construction which is jointly, individually secure and error-correcting. Second, we introduce a new security definition which is a computational analogue of individual security, which we call individual indistinguishability under chosen ciphertext attack (individual IND-CCA1), and show that NHUNCC satisfies it. Third, we present a noise based decoder for N-HUNCC, which permits the decoding of the encoded-thenencrypted data. Finally, we discuss how to select parameters for N-HUNCC and its error-correcting capabilities.

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Alejandro Cohen, Rafael G. L. D'Oliveira, Ken R. Duffy, Muriel Médard. 2022-02-07. Partial Encryption after Encoding for Security and Reliability in Data Systems. https://arxiv.org/abs/2202.03002

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