How Blockchain Prevents Hacks | Security Expert Explains Cryptography, Consensus & Defense Layers

Inside a high-tech security operations room filled with code screens, encryption diagrams, and network monitoring systems, a blockchain security expert breaks down a critical question:

How does blockchain protect itself from being hacked?

Moving beyond buzzwords, this video explains the real security architecture behind blockchain networks—and why attacking them is far more complex than hacking traditional systems.

In this video, the expert explains:

Why blockchains are fundamentally different from centralized databases

How cryptography secures transactions and identities

The role of hashing and immutability in preventing data tampering

How consensus mechanisms (PoW, PoS) defend against attacks

What a 51% attack is—and how realistic it really is

The difference between blockchain-level security and smart contract risks

Common vulnerabilities (bridges, wallets, human error)

Best practices for users to stay secure in Web3

Technical but accessible, this video helps viewers understand where blockchain is strong, where it’s vulnerable, and how security is enforced at every layer.

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