What is the fixed output digest length produced by the secure cryptographic hash algorithm SHA-256?
Answer and explanation
Correct answer: B. 256 bits
- Step 1: The SHA-2 family includes SHA-224, SHA-256, SHA-384, and SHA-512, where the numeric suffix indicates the digest length in bits. Step 2. SHA-256 takes arbitrary-length input data and generates a deterministic, collision-resistant 256-bit (32-byte) message digest. Answer: 256 bits. Why not the others: 128 bits is the output hash length of MD5; 160 bits is the hash length produced by SHA-1; 512 bits is generated by SHA-512.
Practise more Computer Systems, Networking and ICT.
Free questions with an explanation for every one, and full timed Bangladesh Civil Service Preliminary Examination mock tests.
More Computer Systems, Networking and ICT questions
- Which internal CPU register holds the memory address of the next machine instruction to be fetched and executed by the processor?
- Which type of computer memory provides the fastest read and write access times directly to the arithmetic logic unit?
- How many distinct memory addresses can be uniquely referenced by a microprocessor with a 32-bit address bus?
- What is the hexadecimal equivalent of the 8-bit binary number 11011010_2?
- Which logic gate outputs a binary 1 if and only if its two binary inputs are unequal (one is 1 and the other is 0)?
- Which two digital logic gates are considered universal gates because any combinational circuit can be constructed solely using either of the…