Select a Correct Statement Regarding Encryption Methods

Select a correct statement regarding encryption methods?

A) To use symmetric-key encryption,each user needs two different keys.
B) Most companies prefer using symmetric-key encryption than asymmetric-key encryption method.
C) Both symmetric-key and asymmetric-key encryption methods require the involvement of a certificate authority.
D) When conducting e-business,most companies use both symmetric-key and asymmetric-key encryption methods.

Correct Answer:

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