SYSTEM AND METHOD FOR PROVIDING SECURE COLLABORATIVE SOFTWARE AS A SERVICE (SaaS) ATTESTATION SERVICE FOR AUTHENTICATION IN CLOUD COMPUTING

摘要

An architecture and a method are disclosed for providing secure, scalable, and dynamic user configuration in the distributed network for the cloud computing to provide authentication and authorization for the plurality of the users to use the SaaS service. The system includes a hierarchical tree structure that configures the cloud-computing model by using the certificate less identity-based cryptography to establish the hierarchical relationship between the participating entities. The hierarchical model provides a hierarchical certificateless aggregate signature (HCL-AS) for authentication and non-repudiation for SaaS in cloud computing. The HCL-AS generates a collaborative aggregate signature at a parent level of each child node (users) without the loss of identity of the users in the resulting signature and sends an aggregated signature to the third-party software provider. The HCL-AS significantly reduces the computation and communication cost during the user verification and authentication.