Efficient Defense Decision-Making Approach for Multistep Attacks Based on the Attack Graph and Game Theory

Table 2

Strength and payoff of defense action.

No.	Description	Strength	Payoff
D1	Limit packets form ports	0.8	3
D2	Install Oracle patch	0.8
D3	Reinstall Listener program	0.8
D4	Uninstall, delete Trojan	0.7
D5	Limit access to MDSYS.SDO_CS	0.7
D6	Renew root data	0.6	2
D7	Restart database server	0.6
D8	Limit SYN/ICMP packets	0.5
D9	Add physical resource	0.5
d10	Repair database	0.4
d11	Correct homepage	0.4	1
d12	Delete suspicious account	0.3
d13	Redeploy firewall rule and filtrate malicious packets	0.3
d14	Patch SSH on Ftp	0.2