Block Parameters
Security Parameters
Channel
0.089
Asymptotic Rate
0.072
Finite-Size Rate
19%
Finite-Size Penalty
10⁻¹⁰
Security Level
Asymptotic vs Finite-Size Key Rate
Key Rate vs Block Size
Security Parameter Breakdown
Finite-Size Corrections
Parameter estimation:
-0.012
Privacy amplification:
-0.005
Error correction leak:
-0.003
Total correction:
-0.020
Composable Security
Secrecy (ε_sec):
10⁻¹⁰
Correctness (ε_cor):
10⁻¹⁰
Smoothing (ε_s):
10⁻¹⁰
Total (ε_tot):
3×10⁻¹⁰
Attack Models
Collective Attacks
Eve performs identical operations on each signal independently. Security proven with Holevo bound χ_BE.
Practical for most implementations
Coherent Attacks
Eve can perform arbitrary joint operations on all signals. Requires de Finetti reduction with additional penalty.
Strongest security guarantee