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In last few decades, cloud computing has been established itself as a globally accepted platform even in security services needed in various domains having capacity to attain better performance. Security is emerging as an essential issue in IaaS cloud environment. The performance by reducing the number of failure tasks and average failure probability on cloud resources has been carried out in the domain of research to generate efficient schedule for virtual machines (VMs) allocation. Yet, the optimal schedule generation to process security-aware applications stands for a big challenge. So, many researchers have proposed various security-based models for the purpose and leaving scope for more models to be proposed because none of them is proven optimum in all respect. In this paper, a security-aware workflow allocation (SAWA) strategy has been proposed for workflow applications of tasks to machines …