Cryptography

Mathematical techniques for secure communication and data protection.

Parent category: Computer Science

Articles (3)

• Bitcoin and Proof of Work
  How Bitcoin achieves consensus without a central authority: hash chains, mining difficulty, and the energy cost that secures double-spend resistance.
• Hash Functions
  Deterministic functions that map arbitrary data to fixed-size digests, used for integrity checking, password storage, and digital signatures.
• Public-Key Cryptography
  Cryptography with paired public and private keys, enabling encryption and digital signatures without shared secrets.

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