Exam 8: Information Security

To solve the problem of two users having the same password, some operating systems keep a third entry for each user in the password file, namely, ____ at which the user created the password.

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(Multiple Choice)

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Question 1

Correct Answer:

Verified

Sometimes the word hacker is used to denote a person who breaks into someone else's computer.

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(True/False)

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Question 2

Correct Answer:

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True

Provide at least four suggestions for choosing passwords and three suggestions for using passwords.

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(Essay)

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Question 3

Correct Answer:

Verified

Choosing passwords
• Use long passwords (at least eight characters).
• Use a mixture of uppercase and lowercase letters, digits, and special symbols (if allowed on your system).
• Consider using the first letters of some long phrase that is meaningful to you, mixed with some digits or special symbols; for example, the password "TimptIwswa" could be an acronym for "This is my password that I won't share with anyone."
• Avoid personal information such as your name, user ID, pet's name, or birth date.
• Avoid common dictionary words.
• Avoid such obvious choices as "abcde," "123456," or "Hello."
Using passwords
• Change your password often (many systems require this)and do not reuse old passwords.
• Use different passwords for different applications.
• Don't tell anyone your password.
• Don't write your password down.
• Be wary when your browser offers to remember a password for you.
• Be very careful about entering a password over an unencrypted wireless network.

To reduce the chance that two passwords will have the same hash value, a timestamp can be appended to a password, and the result is then run through the encryption algorithm and stored as the encrypted password in the password file.

(True/False)

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Question 4

Some companies now send users a temporary code or password to a trusted device after they have logged in with a valid username and password through a process known as _______

(Multiple Choice)

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Question 5

The ____ maintains a file of user IDs and corresponding passwords.

(Multiple Choice)

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Question 6

Explain at length what a Caesar cipher does.

(Essay)

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Question 7

A ____ attack automatically directs browsers on many machines to a single web address at roughly the same time, causing so much network traffic to that site that it is effectively shut down to legitimate users.

(Multiple Choice)

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Question 8

The ____ takes the password the user originally chooses, chops it up, and stirs it around according to a given formula.

(Multiple Choice)

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Question 9

The first line of defense against illicit use of, or threats to, computer resources and sensitive information is a strong authentication and __________ process.

(Multiple Choice)

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Question 10

The term ____________________ comes about because perpetrators cast out bait, in the form of email messages, to thousands of potential victims in the hope that one or two will "bite" and fall for the scam.

(Short Answer)

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Question 11

Depending on who a given user is, he or she can have various access privileges. What are four examples?

(Essay)

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Question 12

In the early days of computing, when large mainframes were the only option, physical security was enforced by securing the rooms housing these machines. _________________________

(True/False)

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Question 13

A ____ captures the user's passwords and credit card numbers (and sends them to someone else), or may even put the computer under someone else's remote control at some point in the future.

(Multiple Choice)

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Question 14

The main difficulty with a symmetric algorithm is how to securely transmit the secret key.

(True/False)

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Question 15

To try all possible passwords of length k or less would require ____ attempts.

(Multiple Choice)

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Question 16

____ is a practice used to illegally obtain sensitive information such as credit card numbers, account numbers, and passwords.

(Multiple Choice)

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Question 17

In a ____ cipher, a single letter of plaintext generates a single letter of ciphertext.

(Multiple Choice)

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Question 18

____ means keeping information secure-that is, protected from those who should not have access to it.

(Multiple Choice)

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Question 19

How do operating systems solve the problem of a thief stealing a password file and seeing that his password and another password hash to the same value?

(Essay)

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Question 20

Showing 1 - 20 of 50

To solve the problem of two users having the same password, some operating systems keep a third entry for each user in the password file, namely, ____ at which the user created the password.

Sometimes the word hacker is used to denote a person who breaks into someone else's computer.

Provide at least four suggestions for choosing passwords and three suggestions for using passwords.

To reduce the chance that two passwords will have the same hash value, a timestamp can be appended to a password, and the result is then run through the encryption algorithm and stored as the encrypted password in the password file.

Some companies now send users a temporary code or password to a trusted device after they have logged in with a valid username and password through a process known as _______

The ____ maintains a file of user IDs and corresponding passwords.

Explain at length what a Caesar cipher does.

A ____ attack automatically directs browsers on many machines to a single web address at roughly the same time, causing so much network traffic to that site that it is effectively shut down to legitimate users.

The ____ takes the password the user originally chooses, chops it up, and stirs it around according to a given formula.

The first line of defense against illicit use of, or threats to, computer resources and sensitive information is a strong authentication and __________ process.

The term ____________________ comes about because perpetrators cast out bait, in the form of email messages, to thousands of potential victims in the hope that one or two will "bite" and fall for the scam.

Depending on who a given user is, he or she can have various access privileges. What are four examples?

In the early days of computing, when large mainframes were the only option, physical security was enforced by securing the rooms housing these machines. _________________________

A ____ captures the user's passwords and credit card numbers (and sends them to someone else), or may even put the computer under someone else's remote control at some point in the future.

The main difficulty with a symmetric algorithm is how to securely transmit the secret key.

To try all possible passwords of length k or less would require ____ attempts.

____ is a practice used to illegally obtain sensitive information such as credit card numbers, account numbers, and passwords.

In a ____ cipher, a single letter of plaintext generates a single letter of ciphertext.

____ means keeping information secure-that is, protected from those who should not have access to it.

How do operating systems solve the problem of a thief stealing a password file and seeing that his password and another password hash to the same value?

An Introduction to Computer Science

Algorithm Discovery and Design

The Efficiency of Algorithms

The Building Blocks: Binary Numbers, Boolean Logic, and Gates

Computer Systems Organization

An Introduction to System Software and Virtual Machines

Computer Networks and Cloud Computing

Introduction to High-Level Language Programming

The Tower of Babel: Programming Languages

Compilers and Language Translation

Models of Computation

Simulation and Modeling

Ecommerce, Databases, and Data Science

Artificial Intelligence

Computer Graphics and Entertainment: Movies, Games, and Virtual Communities

Making Decisions About Computers, Information, and Society

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