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arxiv: 2605.14959 · v1 · pith:GZN2DJPHnew · submitted 2026-05-14 · ⚛️ physics.optics · quant-ph

Quantum-Secure Physical Unclonable Function enabled by Silicon Photonics Integrated Circuits

G. Sarantoglou , N. Tzekas , G. Moustakas , G.A. Karydis , V. Kaminski , E. Protsenko , K. Gradkowski , A. Bazin
show 3 more authors
C. Vigliar A. Bogris C. Mesaritakis
This is my paper

Pith reviewed 2026-06-30 20:02 UTC · model grok-4.3

classification ⚛️ physics.optics quant-ph
keywords physical unclonable functionssilicon photonicsquantum readoutMach-Zehnder interferometersingle-photon statesauthenticationsilicon nitride
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The pith

Silicon nitride photonic mesh functions as a physical unclonable function when read with single-photon quantum states.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper demonstrates a silicon nitride programmable Mach-Zehnder interferometer mesh that acts as a physical unclonable function because random fabrication variations in the waveguides create an uncontrollable unitary transformation. It introduces a quantum readout protocol that transmits single-photon states through the mesh while employing maximally mixed quantum states to prevent passive eavesdroppers from learning the transformation. Using parameters extracted from an experimental device, Monte Carlo simulations of the authentication protocol yield equal error rates as low as 10 to the minus 14 as a function of detected events and corrected errors.

Core claim

The SiN integrated mesh implements a unitary transformation that serves as a PUF whose secret signature arises from uncontrollable waveguide variations during fabrication, and the quantum readout protocol that combines single-photon states with maximally mixed states allows secure authentication with equal error rates as low as 10^{-14} against adversaries possessing similarly fabricated devices.

What carries the argument

The programmable photonic Mach-Zehnder interferometer mesh that implements a unitary transformation, with its secret physical signature arising from uncontrollable fabrication variations in the waveguides.

If this is right

  • The protocol supports high-security authentication applications that combine silicon photonics with quantum cryptographic guarantees.
  • Authentication performance improves with larger numbers of detected events while remaining robust to a controlled number of corrected errors.
  • The approach extends quantum readout strategies to integrated photonic PUFs that can be fabricated in standard CMOS-compatible processes.
  • Security evaluation focuses on passive eavesdropping and similar-device adversaries, establishing quantitative bounds via Monte Carlo analysis.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The mesh could be scaled in size or combined with other photonic components to increase transformation complexity without changing the quantum readout method.
  • Integration with existing silicon photonic quantum technologies might allow the same hardware to perform both PUF authentication and other quantum tasks.
  • Testing against active quantum attacks that go beyond passive eavesdropping would be a natural next measurement to strengthen the security claim.

Load-bearing premise

The secret physical signature arises from uncontrollable waveguide variations during fabrication, and security holds against adversaries possessing devices fabricated under similar conditions.

What would settle it

A simulation or measurement in which an adversary equipped with a device fabricated under comparable conditions achieves a false acceptance rate substantially above the reported equal error rate of 10^{-14} would falsify the security assessment.

Figures

Figures reproduced from arXiv: 2605.14959 by A. Bazin, A. Bogris, C. Mesaritakis, C. Vigliar, E. Protsenko, G.A. Karydis, G. Moustakas, G. Sarantoglou, K. Gradkowski, N. Tzekas, V. Kaminski.

Figure 5
Figure 5. Figure 5: a-c collectively reveal the fundamental trade-off between robustness and security in the proposed scheme. Given a threshold 𝑁B, when 𝑁@((8@A < 𝑁@(8@A ∗ , the system operates in a regime where robustness dominates, meaning that legitimate users are reliably accepted but the tolerance to adversarial attempts is reduced. Conversely, for 𝑁@(8@A > 𝑁@(8@A ∗ , the system transitions to a security￾dominated regime… view at source ↗
read the original abstract

Physical Unclonable Functions (PUFs) are hardware security primitives whose inherent physical complexity can be exploited for secure authentication and cryptographic key generation. Silicon photonic devices, owing to their suitability for quantum and artificial intelligence applications alongside standard CMOS fabrication processes, constitute a highly promising substrate for integrated multifunctional PUFs. Despite the advanced security guarantees offered by quantum cryptographic protocols and the central role of silicon photonics in quantum technologies, quantum readout strategies based on single-photon states for photonic PUFs remain largely unexplored. In this work, we experimentally demonstrate a silicon nitride (SiN) programmable photonic Mach Zehnder interferometer mesh that implements a unitary transformation and operates as a PUF, whose secret physical signature arises from uncontrollable waveguide variations during fabrication. Using experimentally derived parameters from the SiN integrated mesh, we further introduce and numerically evaluate a quantum readout protocol that combines single-photon states with PUFs. Maximally mixed quantum states are employed to conceal the underlying unitary transformation from passive eavesdropping. Security against adversaries possessing devices fabricated under similar conditions is assessed, with authentication performance quantified through Monte Carlo analysis of the false acceptance and false rejection rates as a function of the number of detected events and corrected errors. The results indicate exceptional performance with equal error rates as low as 10 to the minus 14, highlighting the potential of quantum secure PUFs for high security authentication applications.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

3 major / 2 minor

Summary. The manuscript experimentally demonstrates a silicon nitride programmable photonic Mach-Zehnder interferometer mesh implementing a unitary transformation that functions as a PUF due to fabrication-induced waveguide variations. It then introduces a quantum readout protocol employing single-photon states and maximally mixed states to conceal the unitary from passive eavesdropping, with security against similar-process adversaries assessed and authentication performance quantified exclusively via Monte Carlo simulation of false-acceptance and false-rejection rates, yielding equal error rates as low as 10^{-14}.

Significance. If the Monte Carlo model faithfully incorporates all relevant quantum noise, loss, and eavesdropping channels, the work would indicate a viable route to quantum-secure high-performance authentication primitives on a CMOS-compatible silicon photonics platform; the classical mesh characterization supplies a concrete experimental foundation, though the headline performance numbers remain simulation-dependent.

major comments (3)
  1. [Abstract] Abstract: the headline claim of equal error rates as low as 10^{-14} is obtained solely from Monte Carlo simulation of the quantum protocol using experimentally derived parameters; no experimental single-photon readout, full quantum authentication, or raw data are presented, rendering the exceptional-performance assertion unverified and load-bearing for the central claim.
  2. [Monte Carlo analysis] Monte Carlo analysis (abstract and numerical evaluation section): the procedure lacks any description of the number of trials, explicit noise/loss models, eavesdropping channels, or derivation of the 10^{-14} figure, and reports no error bars or sensitivity analysis; this directly undermines reproducibility of the reported false-accept/reject rates.
  3. [Security assessment] Security assessment (abstract): the claim that security holds against adversaries possessing devices fabricated under similar conditions rests on the concealing power of the maximally mixed states; no quantitative bound on information leakage or concrete test against a same-process adversary is supplied, leaving the weakest assumption unaddressed.
minor comments (2)
  1. [Abstract] Abstract: explicitly state that the quantum protocol is evaluated numerically rather than demonstrated experimentally to prevent misreading the scope of the results.
  2. [Experimental section] The manuscript would benefit from a dedicated section or supplementary material containing the raw mesh transmission data, extracted unitary parameters, and full Monte Carlo code or pseudocode.

Simulated Author's Rebuttal

3 responses · 0 unresolved

We thank the referee for the constructive and detailed comments. We address each major point below. Revisions will be made to clarify the scope of experimental versus numerical results, expand the Monte Carlo description, and strengthen the security discussion with additional quantitative analysis.

read point-by-point responses

  1. Referee: [Abstract] Abstract: the headline claim of equal error rates as low as 10^{-14} is obtained solely from Monte Carlo simulation of the quantum protocol using experimentally derived parameters; no experimental single-photon readout, full quantum authentication, or raw data are presented, rendering the exceptional-performance assertion unverified and load-bearing for the central claim.

    Authors: We agree that the abstract must explicitly distinguish the experimental classical characterization of the SiN MZI mesh (which supplies the unitary parameters) from the numerical Monte Carlo evaluation of the quantum protocol. The 10^{-14} figure is simulation-based. In revision we will rephrase the abstract to state that the PUF is experimentally demonstrated while the quantum readout performance is quantified numerically using those parameters, removing any implication of experimental quantum authentication. revision: yes

  2. Referee: [Monte Carlo analysis] Monte Carlo analysis (abstract and numerical evaluation section): the procedure lacks any description of the number of trials, explicit noise/loss models, eavesdropping channels, or derivation of the 10^{-14} figure, and reports no error bars or sensitivity analysis; this directly undermines reproducibility of the reported false-accept/reject rates.

    Authors: We accept that the current description is insufficient for reproducibility. The revised manuscript will add the number of Monte Carlo trials, explicit models for photon loss, detector noise, and the eavesdropping channel (including how maximally mixed states are prepared), the precise derivation of the equal-error-rate curves, and sensitivity plots with error bars obtained by varying key parameters within their experimental uncertainties. revision: yes

  3. Referee: [Security assessment] Security assessment (abstract): the claim that security holds against adversaries possessing devices fabricated under similar conditions rests on the concealing power of the maximally mixed states; no quantitative bound on information leakage or concrete test against a same-process adversary is supplied, leaving the weakest assumption unaddressed.

    Authors: The security argument is grounded in the information-theoretic hiding property of maximally mixed states. We will insert a new subsection deriving an upper bound on leaked information using the quantum relative entropy between the observed statistics and the maximally mixed case. A direct experimental confrontation with a same-process adversary would require a second independent fabrication run and is outside the present scope; we will note this limitation and identify it as future work while retaining the numerical assessment under the stated model. revision: partial

Circularity Check

0 steps flagged

No significant circularity detected

full rationale

The paper experimentally extracts unitary parameters from a fabricated SiN MZI mesh acting as a classical PUF and feeds those measured values into Monte Carlo simulations of a quantum authentication protocol. The reported EER values are simulation outputs, not quantities fitted to the target result or defined in terms of themselves. No self-citations, uniqueness theorems, or ansatzes are invoked in a load-bearing way that would reduce the central claims to the inputs by construction. The derivation chain remains independent of the reported performance numbers.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The abstract provides no explicit free parameters, axioms, or invented entities beyond standard quantum optics assumptions; the security model against similar-fabrication adversaries is taken as given without further derivation.

axioms (1)
  • domain assumption Maximally mixed quantum states conceal the underlying unitary transformation from passive eavesdropping
    Invoked in the description of the quantum readout protocol.

pith-pipeline@v0.9.1-grok · 5824 in / 1238 out tokens · 23823 ms · 2026-06-30T20:02:06.230156+00:00 · methodology

discussion (0)

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Reference graph

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