Virtual communities (VCs) are open socio-technical structures wherein autonomous entities (i.e. agents) with common objectives join together to mutually satisfy their goals. The success of these communities relies on collaboration and resource sharing principals, making trust a critical issue for each member. Such environments motivate the need for more flexible trust models wherein both individual (i.e. user-centred) and collective (i.e. community-centred) trust requirements are considered in the decision making-process.This paper reports our on-going efforts in that perspective and presents our Adaptive and Socially-Compliant Trust Management System (ASC-TMS). Policies are used, in the system, to specify individual and collective trust requirements, while meta-policies enable agents to dynamically adapt their policies and make socially-compliant trust decisions through automatic combination of individual and collective policies.

Secure Supercloud computing aims to provide security and dependability management of distributed clouds. This approach is both user-centric and self-managed, enabling users to achieve provider independence for security management.he high maintenance costs of private datacenters and disaster-recovery requirements are causing cloud architectures to go distributed. Virtualization is expanding outside a single datacenter for compute, network, storage, and devices. Resource-specialized clouds are becoming federated, evolving from centralized to fully distributed infrastructures across heterogeneous resourcesa cloud-of-clouds-and away from the datacenter to the edge. 1,2 These new architecture paradigms present key benefits:• better user performance (for example, lower end-to-end latency) due to fine-grained geo distribution, • lower costs by choosing best-of-breed cloud providers in terms of pricing model, 3 and • improved resilience to avoid wide-area outages due to single points of failure.

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