Did the CST620-msg. txt and CST620-original-msg. txt files match? • How do you encrypt and decrypt a message using a certificate? • Did the CST620-msg2.txt and CST620-original-msg2.txt files match? • How do you sign a message? • What happens when you try to decrypt an encrypted message with the wrong key or certificate? • How can you verify a message has not been altered? • What happens when a message is changed before getting to its destination, such as in a man-in-the-middle attack?

Consider the following statements: struct nametype{string first; string last; }; struct coursetype{string name; int callnum; int credits; char grade; }; struct studenttype{nametype name; double gpa; coursetype course; }; studenttype student; studenttype classlist[100]; coursetype course; nametype name; mark the following statements as valid or invalid. if a statement is invalid, explain why. a.) student. course. callnum = "csc230"; b.) cin > > student. name; c.) classlist[0] = name; d.) classlist[1].gpa = 3.45; e.) name = classlist[15].name; f.) student. name = name; g.) cout < < classlist[10] < < endl; h.) for (int j = 0; j < 100; j++)classlist[j].name = name; i.) classlist. course. credits = 3; j.) course = studenttype. course;