A data structure used to efficiently verify transaction integrity in a block

What is Smart Contract?

Self-executing code on a blockchain that automatically enforces agreement terms

A computer that maintains a copy of the blockchain and validates transactions

What is Hash Function?

Cryptographic algorithm that converts input data into a fixed-size alphanumeric string

A permanent divergence requiring all nodes to upgrade to the new protocol

What is Genesis Block?

The first block in a blockchain, hardcoded into the software

Blockchain definition

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Oct 04, 2025

Definición

A distributed ledger technology that records transactions in blocks linked chronologically and secured through cryptography

Blockchain was first conceptualized by Satoshi Nakamoto in 2008 as the foundation for Bitcoin, revolutionizing finance by enabling peer-to-peer electronic cash transfers without intermediaries. Today, it supports diverse applications beyond currency, including supply chain tracking and voting systems. Key Resources: Original Bitcoin Whitepaper: Published October 31, 2008. Block Structure: Header (80 bytes) + Transaction data (variable). Average Block Size: Bitcoin ~1.3MB, Ethereum ~80KB. Technical Specifications: Each block contains: timestamp, nonce, merkle root, previous block hash, and transaction data. The chain is maintained by thousands of nodes globally.

keywords

Core Blockchain Concepts

Términos Relacionados

Merkle Tree

Smart Contract

Node

Hash Function

Hard Fork

Genesis Block