A hash is a mathematical function that hides a long string of characters within a shorter one. So you may be staring at what looks like a series of randomly typed characters without ever knowing that hidden in it is the entire U.S. Declaration of Independence.

Hashing is an important foundation of modern cryptography and is one of the building blocks of blockchain’s security features. The hash function also makes it easy to locate data by retrieving the hash value or key associated with it on the index.

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