EMERGING TRENDS IN SOFTWARE ENGINEERING
CLOUD COMPUTING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which hash sizes are most popular to use in SHA-2?
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128
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160
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256
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512
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Explanation:
Detailed explanation-1: -An SHA-512 key is used for HMAC operations. The minimum length for an SHA-512 HMAC key is 64 bytes. A key longer than 64 bytes does not significantly increase the function strength unless the randomness of the key is considered weak. A key longer than 128 bytes will be hashed before it is used.
Detailed explanation-2: -Probably the one most commonly used is SHA-256, which the National Institute of Standards and Technology (NIST) recommends using instead of MD5 or SHA-1. The SHA-256 algorithm returns hash value of 256-bits, or 64 hexadecimal digits.
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