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finite-key

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sat-qkd-security-curves

christopher-altman / sat-qkd-security-curves

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Quantum keys can fail quietly. Loss and noise can leave you with bits, but no secrecy. We model the cliff to expose silent breakage before it becomes a system risk.

simulation turbulence bb84 qkd error-correction quantum-key-distribution atmospheric-loss free-space-optics information-reconciliation photon-counting satellite-qkd privacy-amplification finite-key decoy-state qber optical-link-budget pointing-jitter secret-key-rate attack-models ops-telemetry
  • Updated Jul 26, 2026
  • Python

nqp-llc / enqpy

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Enqpy™ Core — a symmetric stream cipher with a proved ciphertext-only confidentiality invariant: every ciphertext is mathematically consistent with at least 2^128 plaintexts at HIGH. C reference, FCD, test vectors. Proof: enqpy.com/verify

embedded encryption cipher key-wrapping c11 reference-implementation cryptography-tools stream-ciphers symmetric-encryption test-vectors shannon-entropy formal-proof finite-key sbox-free plaintext-equivocation ciphertext-only mod16 patent-non-assertion
  • Updated Sep 13, 2026
  • C

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