Basics of Cryptography: Protecting Data in the Cloud and Online

In an increasingly connected world, securing sensitive information from unauthorized access is more critical than ever. This text-based course guides you through the fundamental principles of cryptography, explaining how data is shielded across the internet and in cloud environments. You will transition from having zero prior knowledge of security concepts to confidently understanding how cryptographic algorithms, keys, and protocols work together to protect global digital infrastructure. What you will learn: Learn the core concepts of symmetric and asymmetric encryption; Understand how cryptographic hash functions and digital signatures ensure data integrity; Discover how secure protocols like HTTPS protect data in transit; Explore modern key management practices and the role of cryptography in cloud security; Examine how zero-trust security architectures rely on continuous cryptographic verification; Practice applying basic cryptographic principles through structured, written scenarios. The course begins with essential security terminology and foundational definitions before moving into modern encryption standards and practical security applications. You will read clear explanations and analyze conceptual code snippets to see how these theories apply to real-world systems. This course is designed entirely for beginners with no prior background in cybersecurity, mathematics, or programming. Start reading today to build a strong foundation in modern data protection and cryptography.