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Which of the following uses a combination of symmetric and asymmetric encryption?

29. Which of the following uses a combination of symmetric and asymmetric encryption?

1. Public Key Infrastructure (PKI)
2. Digital Signature
3. Pretty Good Privacy (PGP)
4. Secure Sockets Layer (SSL) / Transport Layer Security (TLS)

Answer: C) Pretty Good Privacy (PGP)

Explanation:

PGP (Pretty Good Privacy) is a cryptographic encryption and decryption program that uses a combination of both symmetric and asymmetric encryption algorithms to provide secure and private communication.