A controller became aware that a competitor appeared to have access to the company's pricing information. The internal auditor determined that the leak of information was occurring during the electronic transmission of data from branch offices to the head office.Which of the following controls would be most effective in preventing the leak of information?
Answer(s): B
Encryption software uses a fixed algorithm to manipulate plain text and an encryption key a set of random data bits used as a starting point for application of the algorithm to introduce variation. Although data may be accessed by tapping into the transmission line, the encryption key is necessary to understand the data being sent.
The use of message encryption software:
Answer(s): C
Encryption software uses a fixed algorithm to manipulate plain text and an encryption key a set of random data bits used as a starting point for application of the algorithm) to introduce variation. The machine instructions necessary to encrypt and decrypt data constitute system overhead. As a result, processing speed may be slowed.
Which of the following is an encryption feature that can be used to authenticate the originator of a document and ensure that the message is intact and has not been tampered with?
Answer(s): D
Businesses and others require that documents sent over the Internet be authentic. To authenticate a document, a company or other user may transmit a complete plaintext document along with an encrypted portion of the same document or another standard text that serves as a digital signature_ If the plaintext document is tampered with, the two will not match.
The encryption technique that requires two keys, a public key that is available to anyone for encrypting messages and a private key that is known only to the recipient for decrypting messages, is:
Answer(s): A
RSA is an encryption standard licensed to hardware and software vendors. Public- key encryption requires management of fewer keys for a given client-server environment than does private-key encryption. However, compared with DES, RSA entails more complex computations and therefore has a higher processing overhead. RSA requires two keys: The public key for encrypting messages is widely known. but the private key for decrypting messages is kept secret by the recipient.
A client communicates sensitive data across the Internet.Which of the following controls would be most effective to prevent the use of the information if it were intercepted by an unauthorized part?
Encryption technology converts data into a code. Encoding data before transmission over communications lines makes it more difficult for someone with access to the transmission to understand or modify its contents.
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