@teohuiying6
Blockchain technology ensures security through decentralization, cryptography, and consensus mechanisms. Unlike traditional centralized systems, blockchain distributes data across a network of nodes, eliminating single points of failure. Each transaction is encrypted and linked to the previous one, forming an immutable chain. Tampering with any block requires altering all subsequent blocks, which is computationally infeasible.
Additionally, blockchain uses cryptographic hashing to secure data. Transactions must be validated by network participants through consensus algorithms like Proof of Work (PoW) or Proof of Stake (PoS), preventing unauthorized changes. Smart contracts further enhance security by executing agreements automatically when predefined conditions are met.
These features make blockchain highly resistant to fraud, hacking, and data manipulation, ensuring transparency and trust in digital transactions.
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