Composable Security of Distributed Symmetric Key Establishment Protocol

• URL: http://arxiv.org/abs/2304.13789v2
• Date: Mon, 29 Jul 2024 23:12:43 GMT
• Title: Composable Security of Distributed Symmetric Key Establishment Protocol
• Authors: Jie Lin, Manfred von Willich, Hoi-Kwong Lo,
• Abstract summary: We show the composable security of the DSKE protocol in the constructive cryptography framework of Maurer. As DSKE is scalable in a network setting with no distance limit, it is expected to be a cost-effective quantum-safe solution to safeguarding the network security against the threat of quantum computers.
• Score: 4.806505912512235
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The Distributed Symmetric Key Establishment (DSKE) protocol provides secure secret exchange (e.g., for key exchange) between two honest parties that need not have had prior contact, and use intermediaries with whom they each securely share confidential data. We show the composable security of the DSKE protocol in the constructive cryptography framework of Maurer. Specifically, we prove the security (correctness and confidentiality) and robustness of this protocol against any computationally unbounded adversary, who additionally may have fully compromised a bounded number of the intermediaries and can eavesdrop on all communication. As DSKE is highly scalable in a network setting with no distance limit, it is expected to be a cost-effective quantum-safe cryptographic solution to safeguarding the network security against the threat of quantum computers.

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