A Minimum Defense Cost Calculation Method for Attack Defense Trees

Table 2

The meaning of each node in Figure 4.

Node label	Meaning
UG	Bank account
M1	ATM
M2	Online
M3	PIN
M4	Password
A1	Card
A2	Username
A3	Eavesdropping
A4	Find note
A5	Phishing
A6	Keylogger
D1	Face recognition
D2	Report loss
D3	Two-factor authentication
D4	Periodic inspection
D5	Memorization
D6	Server-side filtering
D7	Antivirus software