Blockchain Kya Hai?

Blockchain ek distributed, immutable digital ledger hai jo transactions ko computers ke network par record karta hai.

Kaise Kaam Karta Hai?

Blocks

Har block mein hota hai:

• Transaction data
• Timestamp
• Unique cryptographic hash
• Pichle block ka hash

Chain

Blocks chronological order mein linked hote hain, ek chain banate hain. Kisi ek block ko change karne ke liye sab baad ke blocks change karne honge.

Decentralization

Ek central server ke bajaye, blockchain hazaron nodes worldwide maintain karte hain. Har node ke paas blockchain ki complete copy hoti hai.

Blockchain Ki Iqsaam

Type	Description	Examples
Public	Koi bhi hissa le sakta hai	Bitcoin, Ethereum
Private	Restricted access	Hyperledger
Consortium	Group ke control mein	R3 Corda

Consensus Mechanisms

Proof of Work (PoW)

• Miners puzzles solve kar ke blocks validate karte hain
• Bitcoin use karta hai
• Energy intensive lekin bohat secure

Proof of Stake (PoS)

• Validators unke stake ke hisaab se chune jate hain
• Ethereum 2022 se use kar raha hai
• Zyada energy efficient

⚠️ Taleemi content hai. Financial advice nahi hai.