“Anywhere that needs remembering,” she said.
Data are presented as mean ± SEM. Group comparisons employed one‑way ANOVA with Tukey’s post‑hoc test or two‑tailed unpaired t‑test where appropriate. P < 0.05 was considered statistically significant. JUQ-565
| | Action | Security Goal | |-----------|------------|-------------------| | Preparation | Alice generates a stream of OAM‑encoded photon pairs via spontaneous parametric down‑conversion (SPDC); one photon sent to Bob, the other retained. | Create high‑dimensional entanglement. | | Distribution | Photons travel through low‑loss fiber with mode‑preserving multiplexers; active polarization and OAM compensation modules correct drift. | Preserve entanglement fidelity. | | Basis Choice | Both parties randomly select measurement bases (Fourier‑conjugate OAM sets) using fast electro‑optic modulators. | Enforce complementarity. | | Detection & Sifting | Single‑photon detectors record outcomes; bases are publicly announced, and mismatched events are discarded. | Establish raw key. | | Error Estimation | A random subset (≈5 %) of the raw key is disclosed to compute QBER. | Detect eavesdropping. | | Adaptive Reconciliation | Choose LDPC code based on QBER, exchange syndromes, perform belief‑propagation decoding. | Correct errors while leaking minimal information. | | Privacy Amplification | Apply a universal hash (Toeplitz matrix) to shrink the reconciled key, eliminating Eve’s residual knowledge. | Achieve composable security. | | Authentication | Use FrodoKEM‑derived MAC to authenticate all classical messages. | Guard against active attacks. | | Key Output | The final secret key is stored for one‑time‑pad encryption or as seed material for higher‑layer cryptography. | Provide usable secret. | “Anywhere that needs remembering,” she said
Mara fed the ship coordinates that would expose the ledger’s weakest seam: a shipping yard that handled only paperwork, no heavy freight. She wanted no violence; she wanted the lights on and the cameras keening and witnesses who suddenly remembered names they had been paid to forget. She wanted records returned to the people those records belonged to. P < 0