🔐 Cryptography

Symmetric • Asymmetric • Hash Functions • Digital Signatures • PKI • Post-Quantum

Master the art of secure communication — from ancient ciphers to modern encryption, digital signatures, and quantum-resistant algorithms.

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Cryptographic Concepts & Algorithms

Beginner

📜

Cryptography Basics

Confidentiality, integrity, authentication, non-repudiation.

Classical Ciphers

Caesar, Vigenère, Playfair, transposition ciphers.

XOR & One-Time Pad

XOR cipher, OTP, perfect secrecy, key reuse.

AES (Advanced Encryption)

SubBytes, ShiftRows, MixColumns, AddRoundKey, modes.

DES & 3DES

Feistel network, S-boxes, key schedule, triple DES.

Block Cipher Modes

ECB, CBC, CFB, OFB, CTR, GCM, XTS.

ChaCha20-Poly1305

Stream cipher, AEAD, Poly1305 MAC, TLS cipher.

RSA

Key generation, encryption, decryption, digital signatures.

Diffie-Hellman

Key exchange, discrete logarithm, man-in-the-middle.

ECC (Elliptic Curve)

ECDH, ECDSA, curve selection, Ed25519.

ElGamal

Semantic security, DLP-based, encryption & signatures.

Hash Functions

Pre-image resistance, collision resistance, avalanche effect.

SHA-256 & SHA-3

Merkle-Damgård, Keccak, SHA-2 family, SHA-3.

Password Hashing

bcrypt, scrypt, Argon2, salt, work factor.

HMAC

Keyed-hash MAC, authentication, integrity.

Digital Signatures

Signing, verification, RSA-PSS, ECDSA, EdDSA.

PKI & X.509 Certificates

CA, certificate chains, CRL, OCSP, TLS.

TLS/SSL

Handshake, cipher suites, record layer, TLS 1.3.

Zero-Knowledge Proofs

ZK-SNARK, ZK-STARK, verifiable computation.

Homomorphic Encryption

Partially, fully homomorphic, CKKS, BFV, BGV.

Secret Sharing

Shamir's SSS, threshold schemes, secure multiparty.

Blockchain Cryptography

Merkle trees, hashing, digital signatures, mining.

Smart Contracts

Ethereum, Solidity, bytecode, security considerations.

Post-Quantum Cryptography

Lattice-based, hash-based, code-based, NIST PQC.

Kyber & Dilithium

CRYSTALS-Kyber (KEM), Dilithium (signature), NIST winners.

Lattice-Based Crypto

LWE, Ring-LWE, SIS, NTRU.

Secure Multiparty Computation

Garbled circuits, secret sharing, MPC protocols.

Protocol

Advanced

🙈

Blind Signatures

RSA blind signatures, Chaum, e-cash.

Key Management

Key generation, distribution, rotation, HSMs, KMS.

Key Derivation Functions

PBKDF2, HKDF, Argon2, key stretching.

Cryptanalysis

Brute force, side-channel, differential, linear.

Quantum Algorithms

Shor's, Grover's, quantum attacks on crypto.

Analysis

Quantum

🔐 Cryptography Mastery Roadmap

🔰 Foundation

Classical ciphers, XOR, crypto basics, hash functions

📶 Core

AES, RSA, DH, SHA, PKI, digital signatures

🔥 Deep Dive

ECC, TLS, ZKP, homomorphic, cryptanalysis, blockchains

🏆 Frontier

Post-quantum, MPC, lattice crypto, quantum-safe

🔐 Secure the Future — Master Cryptography

Interactive implementations, protocol analysis, and real-world security challenges.

Back to Home Crypto Services

🔐 Cryptography

Cryptography Basics

Classical Ciphers

XOR & One-Time Pad

AES (Advanced Encryption)

DES & 3DES

Block Cipher Modes

ChaCha20-Poly1305

RSA

Diffie-Hellman

ECC (Elliptic Curve)

ElGamal

Hash Functions

SHA-256 & SHA-3

Password Hashing

HMAC

Digital Signatures

PKI & X.509 Certificates

TLS/SSL

Zero-Knowledge Proofs

Homomorphic Encryption

Secret Sharing

Blockchain Cryptography

Smart Contracts

Post-Quantum Cryptography

Kyber & Dilithium

Lattice-Based Crypto

Secure Multiparty Computation

Blind Signatures

Key Management

Key Derivation Functions

Cryptanalysis

Quantum Algorithms

🔐 Cryptography Mastery Roadmap

Related Computer Science Domains

🔐 Secure the Future — Master Cryptography