Research on Multi-Domain Interoperability Dynamic Access Control Algorithm Under APT Attack

APT (Advanced Persistent Threat) attacks last for a long time and have strong penetration, which allows attackers to obtain a large amount of sensitive data and resources. Traditional access control algorithms cannot completely prevent highly concealed APT attack intrusions and cannot meet the access control requirements in a multi-domain environment. Therefore, this paper proposes a multi-domain interoperability dynamic access control algorithm for APT attacks. The APT attack is mapped to the Petri net, and its attack mode is deeply analyzed. The trust experience, trust knowledge and trust recommendation of each domain in the network under the APT attack are calculated to obtain the trust value of each domain; the domain trust level is obtained based on the domain trust value, and the access rights of the corresponding role in the domain are assigned according to the level to complete the multi-domain interoperability dynamic access control. The experimental results show that the algorithm has high control efficiency and good control performance. The success rate of malicious node requests does not exceed 10%, and the access request takes only 2.3ms. It can be seen that the dynamic access control mechanism proposed in this study can not only effectively deal with APT attack scenarios, but also maintain the high performance of the network while ensuring system security.