1. You receive an email stating you won the London Lottery (although youve never played the London Lottery). Which of the following security services would be necessary to know that this email was really from the London Lottery?

2. The security service that deters an individual from claiming that he or she did not take part of a transaction is

3. Oops!!! You downloaded what you thought was a loan calculator for a new car you want, and you have infected your PC with malware. This type of malware is considered to be a/an ______________.