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What Is the Concept of “Deterministic” Output in Hashing?

A deterministic output means that for a given input, a hash function will always produce the exact same output hash, every single time. If you input "Bitcoin" into SHA-256, the output hash will be identical today, tomorrow, and forever.

This property is fundamental to cryptocurrency and blockchain integrity, as it allows anyone to independently verify that a transaction or block is valid by re-hashing the data and checking if the result matches the recorded hash.

What Is a Hash Collision and Why Is the Avalanche Effect Key to Preventing It in Cryptocurrencies?
Besides Pre-Image Resistance, What Is Another Crucial Security Property of a Cryptographic Hash Function?
How Does the EVM Ensure Deterministic Execution?
What Is a Collision Attack and How Does It Relate to Hash Function Security?