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Open AccessArticle

Integrating Classical Preprocessing into an Optical Encryption Scheme

by Hai Pham 1,2,†, Rainer Steinwandt 1,† and Adriana Suárez Corona 3,*,†
Department of Mathematical Sciences, Florida Atlantic University, Boca Raton, FL 33431, USA
West Campus Mathematics Division, Valencia College , Orlando, FL 32811, USA
Department of Mathematical Sciences, Universidad de León, 24071 León, Spain
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Entropy 2019, 21(9), 872;
Received: 25 July 2019 / Revised: 29 August 2019 / Accepted: 3 September 2019 / Published: 7 September 2019
Traditionally, cryptographic protocols rely on mathematical assumptions and results to establish security guarantees. Quantum cryptography has demonstrated how physical properties of a communication channel can be leveraged in the design of cryptographic protocols, too. Our starting point is the AlphaEta protocol, which was designed to exploit properties of coherent states of light to transmit data securely over an optical channel. AlphaEta aims to draw security from the uncertainty of any measurement of the transmitted coherent states due to intrinsic quantum noise. We present a technique to combine AlphaEta with classical preprocessing, taking into account error-correction for the optical channel. This enables us to establish strong provable security guarantees. In addition, the type of hybrid encryption we suggest, enables trade-offs between invoking a(n inexpensive) classical communication channel and a (more complex to implement) optical channel, without jeopardizing security. Our design can easily incorporate fast state-of-the-art authenticated encryption, but in this case the security analysis requires heuristic reasoning. View Full-Text
Keywords: symmetric encryption; all-or-nothing transform; optical channel; provable security symmetric encryption; all-or-nothing transform; optical channel; provable security
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Pham, H.; Steinwandt, R.; Suárez Corona, A. Integrating Classical Preprocessing into an Optical Encryption Scheme. Entropy 2019, 21, 872.

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