Which of the following is a hash algorithm?

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Multiple Choice

Which of the following is a hash algorithm?

Explanation:
A hash function takes input data and produces a fixed-size digest; it’s deterministic and one-way, making it ideal for verifying data integrity. SHA-1 is a cryptographic hash function that outputs a 160-bit digest, so it fits the definition of a hash algorithm. The other items are different cryptographic primitives: DSA is used for creating and verifying digital signatures; RSA is an asymmetric algorithm used for encryption and signatures; HMAC is a message authentication code that combines a hash function with a secret key to provide both integrity and authenticity. Since the question asks for a hash algorithm, SHA-1 is the correct choice.

A hash function takes input data and produces a fixed-size digest; it’s deterministic and one-way, making it ideal for verifying data integrity. SHA-1 is a cryptographic hash function that outputs a 160-bit digest, so it fits the definition of a hash algorithm. The other items are different cryptographic primitives: DSA is used for creating and verifying digital signatures; RSA is an asymmetric algorithm used for encryption and signatures; HMAC is a message authentication code that combines a hash function with a secret key to provide both integrity and authenticity. Since the question asks for a hash algorithm, SHA-1 is the correct choice.

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