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Practical cryptography guides for engineers. Each page connects theory to real systems, BFSI use cases, and quantum impact.
Hashing
SHA-256, SHA-512, MD5: what they are, how they work, and when to use each.
TLS & mTLS
How TLS 1.3 works end to end. What mTLS adds for mutual authentication.
PKI & Certificates
Root CAs, intermediate CAs, certificate chains, and what can go wrong.
The Quantum Threat
What makes quantum computers dangerous to RSA and ECDH. HNDL explained.
Digital Signatures
How RSA, ECDSA, and the new ML-DSA (FIPS 204) signatures work.
Hybrid Encryption
Why we combine asymmetric and symmetric crypto, and how it applies to PQC.