Which of the following is NOT a hashing algorithm?

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BlackTom AI · Accepted Answer

The task asks us to identify which option is not a hashing algorithm.
Option a: SHA-1. This is a widely known hashing (digest) algorithm that takes input data and produces a fixed-size hash, used for integrity checks and digital signatures. Therefore, this is a hashing algorithm.
Option b: SHA-256. This is another member of the SHA-2 family that outputs a 256-bit hash. It is clearly a hashing function and is commonly used in security protocols. Thus, this is a hashing algorithm.
Option c: AES. AES stands for Advanced Encryption Standard and is a symmetric-key encryption algorithm used to securely encrypt and decrypt data with a secret key. It does not produce a hash or digest of data, and it serves a different cryptographic purpose than hashing. Therefore, this is not a hashing algorithm.
Option d: MD5. MD5 is a hashing algorithm that produces a 128-bit hash value and has historically been used for checksums and data integrity, though it is now considered cryptographically broken for many security purposes. Hence, this is a hashing algorithm.
In summary, the only option that is not a hashing algorithm is AES, because it is an encryption algorithm, not a hashing function.

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Which of the following is NOT a hashing algorithm?

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