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Foundations: Cryptography / Hash Functions

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Hash Functions
Mar 21, 2026
What Is Keccak-256?

What Is Keccak-256?

Learn what Keccak-256 is, how its sponge construction works, why rate and capacity matter, and why Ethereum keccak256 differs from SHA3-256.

21 min read

Hash Functions
Mar 21, 2026
What is SHA-256?

What is SHA-256?

Learn what SHA-256 is, how it works internally, why it matters in cryptography and blockchains, and where its assumptions and limits matter.

24 min read

Hash Functions
Mar 21, 2026
What is Poseidon Hash?

What is Poseidon Hash?

Learn what Poseidon hash is, why it was built for zero-knowledge proofs, how its sponge and HADES rounds work, and where its tradeoffs matter.

24 min read

Hash Functions
Mar 21, 2026
What is a Cryptographic Hash Function?

What is a Cryptographic Hash Function?

Learn what cryptographic hash functions are, how they work, and why collision and preimage resistance make them essential in modern cryptography.

24 min read

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