QuStream's cryptographic foundations and publication status, accurately labelled.
Technical paper, February 2026
Introduces q-stream v2: authenticated public quantum-noise epochs plus a self-ratcheting secret DFK state. Defines QS-OTP reservoir mode for manually initialized deployments, with bounded information-theoretic claims, explicit leakage accounting, and OTP-grade non-reuse semantics.
View paperIACR 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.
View paperConference paper, FTC 2025, Munich (Springer LNNS)
Describes the earlier Q-Stream architecture: Q-Blocks, DFKs, MEKs, Master-Node/Proxy-Node roles, and the forward-linked DFK chain. Historical v1 context; the current v2 paper replaces embedded markers with pure-noise epochs and a DFK ratchet.
View paperIACR ePrint, unreviewed preprint
Analyzes the earlier Q-Block embedding construction for QKD last-mile delivery. Historical v1 context; v2 avoids transmitting key material and derives traffic keys locally from authenticated public epochs.
View paperIACR 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.
View paperIACR 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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Technical Documentation