BlockWorld 2018

In this talk the speaker will explain very briefly the key cryptographic concepts used in the blockchain systems and will demonstrate them with Python code: - Elliptic curve cryptography (ECC), ECC concepts, curves, secp256k1, ed25519 - From private key to public key to blockchain address - Generating Ethereum addresses / signing / verifying signed messages - Cryptographic hash functions like SHA256, SHA3, RIPEMD160, … - HMAC and key derivation, key-derivation functions like HMAC-SHA256, PBKDF2, SCrypt - Blockchain wallets: simple keystores and HD wallets (BIP39 and BIP44), wallet formats (like JSON / UTC), wallet encryption (AES + padding + CBC/CTR, SCrypt, HMAC)