Applied Cryptography: Encryption, Hashing, and Digital Signatures

<p>A story-driven walkthrough of applied cryptography: how a fintech engineer chooses between symmetric and asymmetric encryption to protect stored data, replaces unsalted password hashes with Argon2, verifies message integrity with HMACs, and builds digital signatures and TLS certificate verification to prove authenticity end to end.</p>

Tools: applied cryptography, encryption, hashing, digital signatures, pki