What is a hash in blockchain

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In the context of blockchain, a hash refers to an values that meet the specified.

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What Is Hashing? - What Is Hashing With Example - Hashing Explained Simply - Simplilearn
A hash function is a mathematical function that takes an input string of any length and converts it to a fixed-length output string. Hashing in blockchain is a cryptographic process used to generate digital fingerprints for secure transaction verification and password storage. Hashing is a cryptographic function that converts a string of characters of any length into a unique output, or hash, of fixed length.

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It is used to verify whether or not that information has been tampered with or changed in any way. Advantages of Hashing in Blockchain Security Enhancement Through Hashing Hash functions contribute significantly to the security of blockchain. The blockchain only contains validated transactions, which prevents fraudulent transactions and double spending of the currency.