2. Reading Exercises:

Exercise 1. Read and memorize using a dictionary:

Technique, to modify, security violation, unauthorized, to take advantage of, intruder, to infer, proprietary program, to prevent, denial, contrary to, supposedly, to verify, to shield, to encipher, redundant, circuit, objective, authentication, threat, remote-access system

Exercise 2. Answer the questions:

1. What categories of potential security violations are there?

2. What does the term “security describe”?

3. What is “traffic analysis”?

4. What does the term “unauthorized” mean?

5. What examples of security techniques are listed in the text?

Exercise 4. Match the left part with the right:

1 An example of an authentication technique is	a) labeling of computer-stored files with lists of authorized users.
2. The objective of a secure system is	b) those security techniques that verify the identity of a person (or other external agent) making a request of a computer system.
3. An example of a protection technique is	c) demanding a password.
4. Similarly, the term authentication is used for	d) to prevent all unauthorized use of information, a negative kind of requirement.

THE SPEAKING MODULE

II. Speaking Exercises:

Exercise 1. Define the terms using the suggested words and expressions as in example:

Information science	Password	Algorithm	Computer
discipline, deals with, processes, storing, transferring, information	String, characters, allows, someone, access, computer system	Series, mathematical, steps	electronic device storing processing data

EXAMPLE: Information science is a discipline that deals with the processes of storing and transferring information.

Exercise 2. Ask questions to the given answers:

1)Question: ___________________________________________ ?

Answer: This paper concentrates on protection and authentication mechanisms, with only occasional reference to the other equally necessary security mechanisms.

2) Question: ___________________________________________ ?

Answer: One should recognize that concentration on protection and authentication mechanisms provides a narrow view of information security, and that a narrow view is dangerous.

3)Question: ___________________________________________ ?

Answer: Historically, the literature of computer systems has more narrowly defined the term protection to be just those security techniques that control the access of executing programs to stored information.