What is Blockchain?

What is Blockchain?

Blockchain is a decentralised, distributed digital ledger that records transactions across a network of computers. Each record — called a “block” — is linked to the previous one using cryptography, forming an unbreakable chain. Once data is written to the blockchain, it cannot be altered without consensus from the network.

This makes blockchain ideal for use cases requiring trust, transparency, and tamper-proof records: financial transactions, supply chain tracking, digital identity, smart contracts, and decentralised applications (dApps).

Key Concepts

• Distributed ledger — Every participant in the network holds a copy of the entire ledger
• Immutability — Once recorded, data cannot be changed retroactively
• Consensus mechanisms — Proof of Work (PoW), Proof of Stake (PoS), and others ensure network agreement
• Smart contracts — Self-executing contracts with terms written directly into code
• Decentralisation — No single entity controls the network

Business Applications

• Supply chain — Track products from manufacturer to consumer with verifiable provenance
• Finance (DeFi) — Decentralised lending, borrowing, and trading without banks
• Digital identity — Self-sovereign identity solutions for verifiable credentials
• Tokenisation — Represent real-world assets as digital tokens for fractional ownership
• Smart contracts — Automate business agreements, royalty payments, and escrow

Related Services

Our Blockchain / Web3 team develops smart contracts, decentralised applications, and tokenisation solutions for Indian and global businesses.

Sources: Gartner (2025) — Emerging Tech Hype Cycle; Statista (2025) — Emerging Tech Market; MIT Technology Review (2025) — Tech Trends; Deloitte (2025) — Tech Innovation Report.