Research on Security Defense Strategy of Information System Based on Dynamic Security Management Model

doi:10.3969/j.issn.1671-1122.2026.01.005

Abstract

Abstract:

Aiming at the limitation of static security management mode in dealing with dynamic security management scenarios, considering the influence of offensive and defensive confrontation behavior on strategy selection, this paper put forward a security defense strategy selection method of information system based on dynamic security management mode. Combining belief theory, a belief random game model was constructed to effectively simulate the belief state and the attack and defense process of information systems in the face of different security threats. By analyzing the game relationship between them, the security state of the system was evaluated, and the defense costs and benefits of managers in the attack and defense state were calculated, as well as the impact on the success rate of attacks, so as to the optimal defense strategy. Taking the real classified information system as the research object, this paper demonstrated the effectiveness of the experiment from three aspects: attack success rate, defense cost and defense benefit, which provides scientific basis and improvement suggestions for the security management of information system.

Key words: information system security, dynamic management model, refined Bayesian, belief theory

CLC Number:

TP309

WU Yue, ZHANG Yawen, CHENG Xiangran. Research on Security Defense Strategy of Information System Based on Dynamic Security Management Model[J]. Netinfo Security, 2026, 26(1): 59-68.

Figures/Tables 10

References 19

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	管理者
攻击者	HPer	$\left[ \begin{matrix} \left( {{U}_{\text{HPer},\alpha,{{\rho }_{1}}}},{{U}_{\text{D},\eta,\sim {{\mu }_{1}}}} \right) & \left( {{U}_{\text{HPer},\alpha,\sim {{\rho }_{1}}}},{{U}_{\text{D},\eta,{{\mu }_{1}}}} \right) \\ \left( {{U}_{\text{HPer},\alpha,{{\rho }_{1}}}},{{U}_{\text{D},\sim \eta }} \right) & \left( {{U}_{\text{HPer},\alpha,\sim {{\rho }_{1}}}},{{U}_{\text{D},\sim \eta }} \right) \\ \end{matrix} \right]$
	MPer	$\left[ \begin{matrix} \left( {{U}_{\text{MPer},\beta,{{\rho }_{2}}}},{{U}_{\text{D},\eta,\sim {{\mu }_{2}}}} \right) & \left( {{U}_{\text{MPer},\beta,\sim {{\rho }_{2}}}},{{U}_{\text{D},\eta,{{\mu }_{2}}}} \right) \\ \left( {{U}_{\text{MPer},\beta,{{\rho }_{2}}}},{{U}_{\text{D},\sim \eta }} \right) & \left( {{U}_{\text{MPer},\beta,\sim {{\rho }_{2}}}},{{U}_{\text{D},\sim \eta }} \right) \\ \end{matrix} \right]$
	LPer	$\left[ \begin{matrix} \left( {{U}_{\text{LPer},\gamma,{{\rho }_{3}}}},{{U}_{D,\eta,\sim {{\mu }_{3}}}} \right) & \left( {{U}_{\operatorname{MPer},\gamma,\sim {{\rho }_{3}}}},{{U}_{\text{D},\eta,{{\mu }_{3}}}} \right) \\ \left( {{U}_{\text{LPer},\gamma,{{\rho }_{3}}}},{{U}_{D,\sim \eta }} \right) & \left( {{U}_{\text{MPer},\gamma,\sim {{\rho }_{3}}}},{{U}_{\text{D},\sim \eta }} \right) \\ \end{matrix} \right]$

攻击阶段	攻击动作	成功率	危害程度	操作成本
${{a}_{1}}$	扫描系统漏洞	70%	0.52	50
${{a}_{2}}$	破解密码	40%	0.67	90
${{a}_{3}}$	上传恶意程序	50%	0.81	70
${{a}_{4}}$	提升系统权限	50%	0.95	60
${{a}_{5}}$	安装嗅探器	40%	0.72	80
${{a}_{6}}$	入侵数据库	30%	0.95	110
${{a}_{7}}$	窃取信息	30%	1	200
?	无行动	0	0	0

防御策略	行为描述	符号表示	变迁触发率参数
IDS	入侵检测	${{d}_{1}}$	${{\lambda }_{\text{9}}}$
Anti_Vul	病毒查杀	${{d}_{2}}$	${{\lambda }_{\text{10}}}$
Block_IP	锁定IP	${{d}_{3}}$	${{\lambda }_{\text{11}}}$
Rem_Scri	清除恶意程序	${{d}_{4}}$	${{\lambda }_{\text{12}}}$
Rem_Sniffer	清除嗅探器	${{d}_{5}}$	${{\lambda }_{\text{13}}}$
Trace_IP	溯源追查	${{d}_{6}}$	${{\lambda }_{\text{14}}}$
?	无行动	${{d}_{7}}$	${{\lambda }_{\text{15}}}$

行为	${{d}_{1}}$	${{d}_{2}}$	${{d}_{3}}$	${{d}_{4}}$	${{d}_{5}}$	${{d}_{6}}$	${{d}_{7}}$
防御方案1	√	—	√	√	—	√	√
防御方案2	√	√	√	—	—	—	√
防御方案3	√	√	√	√	√	—	—
防御方案4	√	—	√	√	√	√	—
防御方案5	—	—	√	—	√	√	—
防御方案6	√	—	√	—	√	—	—
防御方案7	—	√	—	√	—	√	—

防御策略组合	窃取信息成功率	总防御成本	总防御者收益
本文方法	70.23%	0	-253.12
防御方案1	35.14%	20.35	-153.89
防御方案2	25.29%	33.92	-109.24
防御方案3	40.64%	50.28	-113.36
防御方案4	25.42%	50.69	-70.47
防御方案5	15.67%	84.45	-55.98
防御方案6	20.28%	70.22	-120.48
防御方案7	40.64%	50.64	-124.93