Cryptography

Cryptographic mathematics, encryption algorithms, hashing primitives, and secure signatures.

topics
topic Symmetric Cryptography AES, ChaCha20, block ciphers, modes (CBC, GCM, CTR), and key derivation. read topic Asymmetric Cryptography RSA, ECC, Diffie-Hellman key exchange, and the discrete logarithm problem. read topic Digital Signatures RSA signatures, ECDSA, Ed25519, signature verification, and non-repudiation. read topic Cryptographic Hashing SHA-2/3, MD5 (broken), length extension attacks, and hash-based message authentication (HMAC). read topic TLS in Depth Handshake, cipher suite negotiation, certificate validation, forward secrecy, and 1.3 improvements. read topic Key Exchange Diffie-Hellman, ECDH, key encapsulation mechanisms (KEM), and post-quantum cryptography. read topic Certificates X.509, Certificate Authorities, chain of trust, Let's Encrypt, and mTLS. read