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Protocol Foundations 004

Paper Mario Havel, Tim Beiko

This paper explains how hashes and hash-based data structures, particularly hash tables and Merkle trees, enable efficient data integrity verification and lookup in large-scale information systems. The authors build on foundational cryptographic concepts to demonstrate how these structures form the basis for secure data proofs in modern digital infrastructure.

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Protocol Foundations 001: Cryptography

This foundational paper traces the historical development of cryptography from Caesar ciphers to modern encryption techniques, establishing symmetric-key encryption as a core design principle where a shared key enables both encryption and decryption of messages. The authors situate cryptographic methods as essential infrastructure for secure communication protocols, with examples ranging from wartime military applications to contemporary computational systems.

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Protocol Foundations 003: Hashing

This paper explains cryptographic hashing as a fundamental building block of digital infrastructure, defining hash functions as one-way operations that deterministically map arbitrary-sized inputs to fixed-sized outputs while revealing no information about the input. The authors emphasize key properties including collision resistance and the practical irreversibility of hashing, distinguishing it from encryption.

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