Laboratoires Structure

Laboratoires Structure

Laboratoires Structure is an independent research lab in Montréal working on post-quantum cryptography. Its current program runs along three directions: compact post-quantum authentication for internet protocols, diversification of cryptographic hardness assumptions, and the formal composition of hybrid PQC+QKD systems. The lab publishes implementations, reproductions, measurements, and notes — including negative results. Documented dead ends are inventory, not waste.

Research directions

  1. 01
    Compact PQ Authentication

    How ML-DSA, Falcon, and SLH-DSA behave inside the size budgets of real internet protocols.

  2. 02
    Assumption Diversification

    Treating cryptographic-monoculture risk as a portfolio problem, with code-based primitives as the first hedge.

  3. 03
    Hybrid PQC+QKD Composition

    Building the quantum-information and composable-security foundations that hybrid PQC+QKD deployments outran.

Full research agenda →

Latest writing

  1. Technical Report
    Certificate Chain Sizes Under Post-Quantum Signatures
  2. Implementation
    Sampling Module-LWE Instances: A Reference Reproduction
  3. Reading Notes
    Reading Notes: Composability and the Hybrid Argument
  4. Essay
    The Authentication Half of the Migration
All writing →