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Which of the following are used to generate a message digest by the network security protocols? (P) RSA (Q) SHA-1 (R) DES (S) MD5

1. P and R only
2. Q and R only
3. Q and S only
4. R and S only

Correct answer: Q and S only

Solution

SHA-1 and MD5 are cryptographic hash functions specifically designed to produce message digests, which are used to ensure data integrity. RSA and DES, on the other hand, are encryption algorithms and do not generate message digests.

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