Insertion of messages into the network from a fraudulent source is a __________ attack.

An outer join selects all of the records from one database table and only those records in the second table that have matching values in the joined field

Indicate whether the statement is true or false

Discuss the algebra of authentication and its implications for privacy. That is, assume a situation with two-factor authentication, and call the factors A and B. Consider the four cases in which each one is strong or weak. What conclusions would you draw about the results: weak A and weak B; weak A and strong B; strong A and weak B; strong A and strong B? Does order matter? Does it matter if both

factors are of the same type (what you know, what you have, what you are)? What happens if you add a third factor, C? What will be an ideal response?