What Is Cryptography? The 4 Security Goals (Practical Crypto #1)

Cryptography is already inside every app you build or test. In this beginner-friendly lesson, I explain what cryptography actually protects and the four goals that organize the subject: confidentiality, integrity, authentication, and non-repudiation. You’ll learn: where TLS, password hashing, signed JWTs, and software signatures fit why encryption and integrity are different how strong algorithms still fail through weak implementation the four questions developers and QA engineers should ask when testing crypto Lecture 1 of Practical Cryptography for Developers and QA Engineers. #Cryptography #Cybersecurity #SoftwareTesting