高等继续教育 / 计算机专业英语
正确率：100%
题型描述: 单选题
Confidentiality of the message is not enough in a secure communication; ( ) is also needed. The receiver needs to be sure of the sender’s identity.
A. authentication
B. encryption
C. authorization
D. encapsulation
Confidentiality of the message is not enough in a secure communication; ( ) is also needed. The receiver needs to be sure of the sender’s identity.
A. authentication
B. encryption
C. authorization
D. encapsulation
参考答案：