A Primer on Underwater Quantum Key Distribution

Table 2

Comparative summary of discrete QKD protocols.

Protocol	Basis	Number of basis	Number of bases states
BB84	Orthogonal	2	4
E91	Nonorthogonal	3	5
BBM92	Orthogonal	2	4
B92	Nonorthogonal	1	2
Six-state	Conjugate	3	6
SARG04	Orthogonal	2	4