Which of the following dimensions of e-commerce security is not provided for by encryption?
A. confidentiality
B. availability
C. message integrity
D. nonrepudiation
查看答案
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