A hash function is a cryptographic algorithm that transforms input data into a fixed-size string of characters, known as a hash. This output is unique to the input data, making it nearly impossible to reverse-engineer the original information.
Hash functions are fundamental to blockchain technology, as they ensure data integrity and security by enabling quick verification of information without revealing the actual data.
They are used extensively in creating digital signatures, securing transactions, and maintaining the immutability of the blockchain.
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