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Cryptography Essentials

Cryptography is the backbone of blockchain security. It ensures data integrity, privacy, and authenticity in decentralized systems.

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Key Concepts

• Hash Functions: Convert data into a fixed-size string; used for block linking and data integrity.
• Public-Key Cryptography: Enables secure communication and digital identity.
• Digital Signatures: Prove ownership and authorize transactions.

Without cryptography, blockchains and Web3 applications would not be possible.