[Resource Topic] 2024/1320: Post-Quantum DNSSEC over UDP via QNAME-Based Fragmentation

Welcome to the resource topic for 2024/1320

Title:
Post-Quantum DNSSEC over UDP via QNAME-Based Fragmentation

Authors: Aditya Singh Rawat, Mahabir Prasad Jhanwar

Abstract:

In a typical network, a DNS(SEC) message over 1232 bytes would either be fragmented into several UDP/IP packets or require a re-transmit over TCP. Unfortunately, IP fragmentation is considered unreliable and a non-trivial number of servers do not support TCP.

We present \texttt{QNAME}-Based Fragmentation (\mathsf{QBF}): a DNS layer fragmentation scheme that fragments/re-assembles large post-quantum DNS(SEC) messages over UDP in just 1 round-trip while using only standard DNS records. Our experiments show that DNSSEC over \mathsf{QBF}, with either Falcon-512, Dilithium-2 or SPHINCS$^{+} as the zone signing algorithm, is practically as fast as the currently deployed ECDSA-P256 and RSA-2048 setups in resolving \texttt{QTYPE} \texttt{A}$ queries.

ePrint: https://eprint.iacr.org/2024/1320

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