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Journal of Cryptographic Engineering

Post-quantum hybrid key exchange: a systematic mapping study

Alexandre Augusto Giron, Ricardo Felipe Custódio, Francisco Rodríguez‐Henríquez

Published Apr 11, 2022• 34 citations
Publisher
DOI
10.1007/s13389-022-00288-9

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Hybrid authenticated key exchange combines cryptography key material from different sources (classical, quantum and post-quantum cryptography) to build protocols that are resilient to catastrophic failures, technology advances and future cryptanalytic attacks. In this work, we propose and implement a triple-hybrid version of the transport layer security network protocol TLS 1.3, combining classical and post-quantum cryptography, and quantum key distribution. We evaluate the performance of this triple-hybrid TLS in an experimental network scenario and our analysis shows that the quantum-resistant feature comes at an increased communication cost of approximately 68 % over the total time of the composite handshakes. In exchange, our solution is an enhancement to the TLS 1.3 protocol by adding quantum-resistant cryptography schemes.