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For large distributed applications, security and performance are two requirements often difficult to satisfy together. Addressing them separately leads more often to fast systems with security holes, rather than secure systems with poor performance. For instance, caching data needed for security decisions can lead to security violations when the data changes faster than the cache can refresh it. Retrieving...
Application-level multi-tenancy is an architectural design principle for Software-as-a-Service applications to enable the hosting of multiple customers (or tenants) by a single application instance. Despite the operational cost and maintenance benefits of application-level multi-tenancy, the current middleware component models for multi-tenant application design are inflexible with respect to providing...
Interoperability remains a significant challenge in today’s distributed systems; it is necessary to quickly compose and connect (often at runtime) previously developed and deployed systems in order to build more complex systems of systems. However, such systems are characterized by heterogeneity at both the application and middleware-level, where application differences are seen in terms of incompatible...
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