In cryptography a "hash" is a combination of letters and numbers that represent a word or phrase. The hash of a word is guaranteed to be unique for that word and any change whatsoever will result in a completely different hash.
This skill allows you to speak a word and Alexa will return the hash of that word, using the SHA-256 hashing method (different hashing methods will return different hashes for the same word). Try this skill using the word 'cat' and notice how the result will be really, really different than the word 'hat', even though only the first letter is different.
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