Covert Communication Scheme Based on Bitcoin Transaction Mechanism

Table 9

Transaction identification mechanism.

Identification mechanism	Concealment	Efficiency
Fixed address [18]	Weak	High
Update address in the channel [19]	Strong	High
Kleptography algorithm (fixed address) [21]	Weak	Low
Dynamic label (based on improved DGA) [27]	Strong	Middle
Dynamic label (based on HMAC) [28]	Strong	Middle
Ours	Strong	High