![Crypto Terms Glossary: What is Hash Function? Crypto Terms Glossary: What is Hash Function?](/img/143/675/what-is-hash-function-sm.webp)
Hash functions are algorithms that take data of any size and convert it into a fixed-length hexadecimal number, or hash. Hash functions are one-way functions and cannot be reversed to reveal the data inputted to create the hash. The Bitcoin blockchain utilizes the SHA-256 hash algorithm in its transaction validation process.
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