Beyond BB84: A Field Guide to Newer QKD Protocols
MDI, twin-field, continuous-variable and device-independent QKD each remove a different assumption from BB84. A guide to telling them apart before you design around one.
Entanglement-Based QKD: How E91 and BBM92 Actually Work
E91 and BBM92 both distribute entangled photon pairs, but they verify security in completely different ways. That difference decides what you have to trust.
BB84 Explained: How Quantum Key Distribution Actually Works
Bennett and Brassard's 1984 protocol turns key distribution into a physics problem. Here is the mechanism, the eavesdropper maths, and the four things BB84…
Inside ITU-T Y.3800: The Reference Model for QKD Networks
ITU-T Y.3800 turned quantum key distribution from a point-to-point demonstration into a network architecture. What its four layers define, and what they leave open.