In an age where digital communication has become the foundation of personal and professional contacts, the demand for safe and confidential information transmission is greater than ever. The proliferation of media applications has resulted in both extraordinary ease and new risks. As our dependence on these applications rises, so does the need for strong encryption to protect sensitive data from illegal access and breaches.The book consists of eight chapters, Chapter One: Introduction to End-to-End Encryption in Media Applications establishes the foundation of encryption and its critical role in preserving data integrity and privacy. It lays the framework for understanding how encryption is used in various media applications, as well as the significance of end-to-end encryption (E2EE) in guaranteeing that only intended receivers have access to send data. Chapter Two covers the fundamentals of symmetric encryption, which uses the same key for both encryption and decoding. It examines commonly used algorithms such as AES and DES, addressing their benefits, shortcomings, and uses in media settings. Chapter Three explains the area of public-key cryptography, in which different keys are utilized for encryption and decoding. It discusses key techniques such as RSA and Elliptic Curve Cryptography, emphasizing their importance in safeguarding media interactions and the difficulties involved with their implementation. The fourth chapter presents the Building End-to-End Encryption in Media Applications. This chapter guides readers through the process of developing and deploying secure communication channels, with a focus on the complexities of assuring data security from sender to recipient.Chapter Five focuses on one of the most important parts of encryption: maintaining and securely distributing encryption keys. It covers a variety of key management strategies and best practices, such as the usage of hardware security modules and public key infrastructures.Chapter Six looks at how prominent communication platforms like Zoom, Microsoft Teams, WhatsApp, and Signal employ encryption to secure user data. This chapter gives real-world examples of how these apps maintain security and the problems they confront in a constantly changing threat landscape.Chapter Seven explains the human aspect of security, investigating ways for guaranteeing that only authorized users may access encrypted data. It discusses authentication strategies such as passwords, biometrics, and token-based systems, as well as the use of role-based access control in media applications. The book ends with Chapter Eight, risks and weaknesses in Encrypted Media, which discusses the many risks and weaknesses that encrypted systems face. The chapter discusses the hazards associated with encrypted material, ranging from brute-force attacks to sophisticated cryptanalysis techniques, and proposes ways for minimizing these concerns.This book is designed for a wide range of readers, including software engineers, cybersecurity experts, academics, and students. Whether you want to learn more about encryption technologies or get practical advice on using E2EE in media applications.