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arXiv · 2512.18025

Scalable Multiterminal Key Agreement via Error-Correcting Codes

Benjamin D. Kim·Daniel Alabi·Lav R. Varshney
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Abstract

We explore connections between secret sharing and secret key agreement, which yield a simple and scalable multiterminal key agreement protocol. In our construction, we use error-correcting codes, specifically Reed-Solomon codes with threshold reconstruction, to ensure no information is leaked to an eavesdropper. We then derive novel bounds for both full-rank maximum distance separable codes and our scheme's secret key capacity, using key capacity's duality with multivariate mutual information.

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Benjamin D. Kim, Daniel Alabi, Lav R. Varshney. 2025-12-19. Scalable Multiterminal Key Agreement via Error-Correcting Codes. https://arxiv.org/abs/2512.18025

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