Security Considerations on Hierarchical Topics

FioranoMQ supports ACL settings for hierarchical topics. An ACL can be set for any topic, irrespective of the level at which this topic exists. These ACLs are checked at the time of creation of a publisher and/or subscriber. When creating a subscriber for multiple topics (a topic that involves a template character in its name), the ACLs for all the subtopics are also checked. In addition, the subscriber is modified so that it does not receive messages from all the subtopics that have a negative permission set for that particular user.