To ensure privacy in a public key encryption system, knowledge of which of the following keys would be required to decode the received message?I). PrivateII). Public
Answer(s): A
In a public key system, the public key is used to encrypt the message prior to transmission, whereas the private key is needed to decrypt decode) the message.
To reduce security exposure when transmitting proprietary data communication lines, a company should use:
Answer(s): D
Encryption involves using a fixed algorithm to manipulate plaintext The information is sent in its manipulated form and the receiver translates the information back into plain text. Cryptographic devices protect data in transmission over communication lines.
Which of the following is a computer program that appears to be legitimate but performs some illicit activity when it is run?
Answer(s): C
A Trojan horse is a computer program that appears friendly, for example, a game, but that actually contains an application destructive to the computer system.
The best preventive measure against a computer virus is to:
Preventive controls are designed to prevent errors before they occur. Detective and corrective controls attempt to identify and correct errors. Preventive controls are usually more cost beneficial than detective or corrective controls. Allowing only authorized software from known sources to be used on the system is a preventive measure. The authorized software are from known sources is expected to be free of viruses.
Which of the following is an indication that a computer virus is present?
Answer(s): B
The effects of computer viruses range from harmless messages to complete destruction of all data within the system. A symptom of a virus would be the unexplained loss of or change to data.
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