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Narrow Bandwidth Is Not Inherent in Reverse Public-Key Encryption

Abstract : Reverse Public-Key Encryption (RPKE) is a mode of operation exploiting a weak form of key privacy to provide message privacy. In principle, RPKE offers a fallback mode, if the underlying encryption scheme’s message secrecy fails while a weak form of key privacy survives. To date, all published RPKE constructions suffer from a low bandwidth, and low bandwidth seems naturally inherent to reverse encryption. We show how reverse encryption can, in connection with and as a novel application of anonymous broadcast encryption, achieve high-bandwidth. We point out that by using traditional and reverse encryption simultaneously, a form of crypto-steganographic channel inside a cryptosystem can be provided.
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https://hal.inria.fr/hal-01098406
Contributor : David Naccache <>
Submitted on : Wednesday, December 24, 2014 - 2:51:01 PM
Last modification on : Thursday, July 1, 2021 - 5:58:06 PM

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David Naccache, Steinwandt Rainer, Suárez Adriana, Moti Yung. Narrow Bandwidth Is Not Inherent in Reverse Public-Key Encryption. Security and Cryptography for Networks, Oct 2014, Amalfi, Italy. pp.9, ⟨10.1007/978-3-319-10879-7_34⟩. ⟨hal-01098406⟩

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