This paper investigates how popular digital platforms (Zoom, Facebook, Twitter, and Moodle, etc.) handle data security. It reviews and compares the different methods each platform uses to protect user information, such as encryption techniques, authentication systems, and privacy settings. By organizing this information into a comparison table, the study highlights the unique approaches taken by each application. The goal is to give a clear overview of how these platforms secure data and to point out what they’re doing well and where they could improve. This review can help developers, researchers, and security professionals better understand current practices and design stronger protection strategies for online platforms.
Key words: Data Security,
Cryptography,
Social Media Privacy,
Authentication Methods.
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