Entanglement-based QKD
BBM92
An entanglement-based protocol closely related to BB84 with correlated measurement outcomes.
Core idea
Entangled pairs replace Alice's prepared states; matching-basis outcomes form the sifted key.
Minimal mathematics
QBER and privacy amplification accounting can be treated similarly to BB84 in simplified teaching models.
Typical assumptions
- Entanglement source quality is known
- Finite-key terms omitted
- Loss loopholes not modeled
Common failure modes
- Visibility loss
- Pair source brightness tradeoffs
- Detector effects
Related tools
References
- Bennett, Brassard, and Mermin, 1992