题目内容

Which of the following dimensions of e-commerce security is not provided for by encryption?

A. confidentiality
B. availability
C. message integrity
D. nonrepudiation

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All the following statements about symmetric key encryption are true except:

A. in symmetric key encryption, both the sender and the receiver use the same key to encrypt and decrypt a message.
B. the Data Encryption Standard is a symmetric key encryption system.
C. symmetric key encryption is computationally slower.
D. symmetric key encryption is a key element in digital envelopes.

Symmetric key encryption is also known as:

A. public key encryption.
B. secret key encryption.
C. PGP.
D. PKI.

________ provide secure outsider access to selected shared resources.

Access VPN
B. Intranet VPN
C. Extranet VPN
D. Internet VPN

________ link corporate headquarters, remote offices, and branch offices over a shared infrastructure using dedicated connections.

Access VPN
B. Intranet VPN
C. Extranet VPN
D. Internet VPN

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