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- W4300492417 abstract "A secret key can be used to conceal information from an eavesdropper during communication, as in Shannon's cipher system. Most theoretical guarantees of secrecy require the secret key space to grow exponentially with the length of communication. Here we show that when an eavesdropper attempts to reconstruct an information sequence, as posed in the literature by Yamamoto, very little secret key is required to effect unconditionally maximal distortion; specifically, we only need the secret key space to increase unboundedly, growing arbitrarily slowly with the blocklength. As a corollary, even with a secret key of constant size we can still cause the adversary arbitrarily close to maximal distortion, regardless of the length of the information sequence." @default.
- W4300492417 created "2022-10-03" @default.
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- W4300492417 date "2012-05-17" @default.
- W4300492417 modified "2023-09-27" @default.
- W4300492417 title "Secrecy Is Cheap if the Adversary Must Reconstruct" @default.
- W4300492417 doi "https://doi.org/10.48550/arxiv.1205.3853" @default.
- W4300492417 hasPublicationYear "2012" @default.
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