Blockchain35 min · Lesson 1 of 3

Hashing, Signatures & EVM Internals

The mathematical trust layer. SHA-256, Elliptic Curve Digital Signatures (ECDSA), and the global state machine.

The Trustless Architecture

Blockchains replace human trust with mathematics. We use Hashing to create immutable links between blocks and Public-Key Cryptography to verify transaction ownership without middle-men.

The Ethereum Virtual Machine (EVM)

The EVM is a distributed state machine. Every node in the network executes the same smart contract code and reaches consensus on the final memory state, creating a 'World Computer'.