ISC2 Certified in Cybersecurity (CC) Practice Question
To ensure that a configuration file has not been modified during transit, which process should a security administrator apply before and after transfer?
Encrypt the file using a shared secret key
Compress the file to reduce size and detect changes
Hashing the file before transmission and then hashing it again upon receipt allows the administrator to compare the two hash values. If the values match, the file's integrity is confirmed because cryptographic hash functions produce a fixed-length output that changes completely with any alteration to the input. Hashing does not provide confidentiality, requires no keys, and is therefore different from encryption or compression techniques. Encrypting with a shared key or using a digital signature can offer confidentiality or authenticity, but the simplest integrity-only solution is to generate and compare hashes. Compression is unrelated to integrity verification.
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ISC2 Certified in Cybersecurity (CC)
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