Which of the following would be MOST appropriate to ensure
the confidentiality of transactions initiated via the Internet?
A. Digital signature
B. Data encryption standard (DES)
C. Virtual private network (VPN)
D. Public key encryption
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Answer: D
Encryption is the only way to ensure Internet transactions
are confidential, and of the choices available, the use of
public key encryption is the best method. Digital signatures
would ensure the transaction is not changed and cannot be
repudiated, but would not ensure confidentiality.
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