Research & Publication

QuStream's cryptographic foundations and publication status — accurately labelled.

Publication status legend

PublishedPresented at a peer-reviewed conference or published in a journal
IACR PreprintPosted to IACR ePrint Archive — not yet peer-reviewed
DemonstratedValidated in a controlled demonstration or proof-of-concept
In PilotActive deployment with a partner organisation
In DevelopmentWork in progress; not yet validated externally

QuStream papers

Beyond Shannon: Operational Perfect Secrecy as a Generalised Model for ITS

IACR Preprint

IACR ePrint 2025/1716 — unreviewed preprint

Establishes the formal OPS framework: bounds adversarial success probability to ≤ 2⁻ᵗ. Generalises Shannon perfect secrecy to non-uniform message distributions and removes the requirement that key length equals message length.

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Q-Stream: A Practical System for Operational Perfect Secrecy

Published

Conference paper — FTC 2025, Munich (Springer LNNS)

Describes the practical Q-Stream architecture: Q-Blocks, DFKs, MEKs, Master-Node/Proxy-Node roles, and the forward-linked DFK chain. The only conference-published QuStream paper.

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Extending QKD Information-Theoretic Security to the Last Mile with Q-Stream

IACR Preprint

IACR ePrint — unreviewed preprint

Proves that embedding a QKD-generated ε-secure key inside a QRNG-derived Q-Block preserves ε-security across classical last-mile networks. Enables end-to-end ITS delivery without trusted relay nodes.

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Q-Stream Quantum-Secure Networks

IACR Preprint

IACR ePrint — unreviewed preprint

System-level architecture for ITS-grade network security. Covers the data plane / control plane split, error composition model (ε_QKD + ε_DFK + ε_net), and deployment topologies for finance, defence, critical infrastructure, and satellite.

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QuStream-OTP: Structural Performance Advantages Over AES at Scale

IACR Preprint

IACR ePrint — unreviewed preprint

Architectural and structural analysis across 18 dimensions. Shows that XOR-based OTP encryption avoids AES round-trip overhead. Structural latency floor at 100 Gbit/s: ~4–6 ns (QS-OTP) vs 40–70 ns (AES-GCM hardware). Note: structural analysis, not empirical benchmark from deployed hardware.

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Note on IACR ePrint preprints

Papers 1, 3, 4, and 5 are IACR ePrint preprints. IACR ePrint is an open-access archive — papers are not peer-reviewed before posting. Paper 2 is the only QuStream paper presented at a peer-reviewed venue (FTC 2025, Springer LNNS). We are committed to pursuing independent academic review across all papers.

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