The feature of a digital signature that ensures the sender
cannot later deny generating and sending the message is:
A. data integrity.
B. authentication.
C. nonrepudiation.
D. replay protection.
Answer / guest
Answer: C
All of the above are features of a digital signature.
Nonrepudiation ensures that the claimed sender cannot later
deny generating and sending the message. Data integrity
refers to changes in the plaintext message that would result
in the recipient failing to compute the same message hash.
Since only the claimed sender has the key, authentication
ensures that the message has been sent by the claimed
sender. Replay protection is a method that a recipient can
use to check that the message was not intercepted and replayed.
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When an information security policy has been designed, it is MOST important that the information security policy be: A. stored offsite. B. written by IS management. C. circulated to users. D. updated frequently.
An IS auditor involved as a team member in the detailed system design phase of a system under development would be MOST concerned with: A. internal control procedures. B. user acceptance test schedules. C. adequacy of the user training program. D. clerical processes for resubmission of rejected items.
In planning an audit, the MOST critical step is the identification of the:
Applying a retention date on a file will ensure that: A. data cannot be read until the date is set. B. data will not be deleted before that date. C. backup copies are not retained after that date. D. datasets having the same name are differentiated.
An IS auditor conducting a review of disaster recovery planning at a financial processing organization has discovered the following: * The existing disaster recovery plan was compiled two years ago by a systems analyst in the organization's IT department using transaction flow projections from the operations department. * The plan was presented to the deputy CEO for approval and formal issue, but it is still awaiting his attention. * The plan has never been updated, tested or circulated to key management and staff, though interviews show that each would know what action to take for their area in the event of a disruptive incident. The IS auditor's report should recommend that: A. the deputy CEO be censured for his failure to approve the plan. B. a board of senior managers be set up to review the existing plan. C. the existing plan be approved and circulated to all key management and staff. D. a manager coordinate the creation of a new or revised plan within a defined time limit.
In which of the following phases of the system development life cycle (SDLC) is it the MOST important for the IS auditor to participate? A. Design B. Testing C. Programming D. Implementation
The PRIMARY purpose of undertaking a parallel run of a new system is to: A. verify that the system provides required business functionality. B. validate the operation of the new system against its predecessor. C. resolve any errors in the program and file interfaces. D. verify that the system can process the production load.
If the decision has been made to acquire software rather than develop it internally, this decision is normally made during the: A. requirements definition phase of the project. B. feasibility study phase of the project. C. detailed design phase of the project. D. programming phase of the project.
When auditing the requirements phase of a system development project, an IS auditor would: A. assess the adequacy of audit trails. B. identify and determine the criticality of the need. C. verify cost justifications and anticipated benefits. D. ensure that control specifications have been defined.
Which of the following access control functions is LEAST likely to be performed by a database management system (DBMS) software package? A. User access to field data B. User sign-on at the network level C. User authentication at the program level D. User authentication at the transaction level
Online banking transactions are being posted to the database when processing suddenly comes to a halt. The integrity of the transaction processing is best ensured by: A. database integrity checks. B. validation checks. C. input controls. D. database commits and rollbacks.
A call-back system requires that a user with an id and password call a remote server through a dial-up line, then the server disconnects and: A. dials back to the user machine based on the user id and password using a telephone number from its database. B. dials back to the user machine based on the user id and password using a telephone number provided by the user during this connection. C. waits for a redial back from the user machine for reconfirmation and then verifies the user id and password using its database. D. waits for a redial back from the user machine for reconfirmation and then verifies the user id and password using the sender's database.