Which statement best describes the SHA family?

Which statement best describes the SHA family?

• A. Hashing
• B. Encryption
• C. Public Key
• D. Symmetric

Answer: (A)

SHA family are cryptographic hash functions that take input data and produce a fixed-length digest. They are designed to be deterministic, fast to compute, and one-way, with properties like preimage resistance and collision resistance, so you can’t easily recover the original data or find two inputs that produce the same hash. This makes them ideal for verifying data integrity, supporting digital signatures, and hashing passwords (often with a salt). It isn’t encryption, because there’s no key to encrypt or decrypt, and hashes aren’t reversible. It also isn’t a public-key or symmetric algorithm, which rely on keys to transform data. Variants like SHA-256, SHA-512, and SHA-3 all serve the hashing purpose.

SHA family are cryptographic hash functions that take input data and produce a fixed-length digest. They are designed to be deterministic, fast to compute, and one-way, with properties like preimage resistance and collision resistance, so you can’t easily recover the original data or find two inputs that produce the same hash. This makes them ideal for verifying data integrity, supporting digital signatures, and hashing passwords (often with a salt). It isn’t encryption, because there’s no key to encrypt or decrypt, and hashes aren’t reversible. It also isn’t a public-key or symmetric algorithm, which rely on keys to transform data. Variants like SHA-256, SHA-512, and SHA-3 all serve the hashing purpose.