Parveen Yadav is a security researcher and freelance ethical hacker who has received recognition from Google, Amazon, Paypal, and Adobe for their work. Their paper titled "Cloud Computing & Security" discusses the basics of cloud computing including characteristics like multi-tenancy, scalability, elasticity, device independence, and reliability. It also covers cloud service models, deployment models, opportunities and challenges of cloud computing, and common attacking methods. The document provides an overview of cloud computing concepts.