Abstract: A data collation system and method is disclosed that utilise a central repository, a collection agent, one or more branch agents and one or more leaf agents. Each of the leaf agents is associated with a respective branch agent and each branch agent is associated with the collection agent. Each leaf agent is associated with a computer system and is arranged to obtain data associated with the respective computer system, secure the data, collate the secured data into a batch and transmit the batch to the leaf agent's associated branch agent. Each branch agent is responsive upon receipt of a batch to verify the batch, collate verified batches in an augmented batch and transmit the augmented batch to the collection agent. The collection agent is responsive upon receipt of an augmented batch to verify the augmented batch and store verified augmented batches in said central repository.

Abstract: A verification system and method for audit data obtained from an infrastructure serving a plurality of entities are disclosed. A central repository and a number of leaf agents are used, each leaf agent being deployed to a part of the infrastructure and arranged to generate one or more index chains, each index chain being associated with one of said entities. Leaf agents submit their index chains for storage in the central repository, each index chain including one or more indices referencing audit data from the part of the infrastructure determined to be relevant to the entity and linking to indices referencing other audit data enabling integrity and relative timing of the referenced audit data with respect to the other audit data to be verified.

Abstract: A monitoring method and system for monitoring compliance of a policy in an IT infrastructure (150) are described. A modeling component (110) and an analysis system (110) are used. The modeling component (110) is arranged to model the policy and configure the analysis system in dependence on the model and the analysis system (100) is arranged to monitor aspects of the IT infrastructure (150) in dependence on the model.