Unit 4 review

There are a number of different cryptography methods that range in complexity, but it is always important to add a layer of encryption to your private data. Which of the following are ways to encrypt your own private data? Circle all that apply

• Using strong passwords

• Setting up and using 2-factor authentication

• Only clicking on links that are sent through email

• Safe web browsing

• Using the same password for every site or app

An encryption method that uses a series of interwoven Caesar ciphers based on the letters of a keyword is called

• Hashing

• the Vigenère Cipher

• the symmetric key

• public key encryption

Encrypted information is only viewable by authorized users who have the correct key to decrypt. This describes which aspect of the CIA triad?

• Integrity

• Confidentiality

• Availability

• Collisions

What is the term used in cryptography for the message after encryption?

• Algorithm

• Ciphertext

• Key

• Plaintext

Using the Caesar cipher, “HELLO” is encrypted to “OLSSV” by applying a shift of 7. The message “HELLO” is considered the ________.

• Algorithm

• Ciphertext

• Key

• plaintext

Using the Caesar cipher, “HELLO” is encrypted to “OLSSV” by applying a shift of 7. The number 7 is considered the ________.

• Algorithm

• Ciphertext

• Key

• plaintext

What is the term used in cryptography when the same key is used to encrypt and decrypt the data?

• Asymmetric Encryption

• Substitution Cipher

• Reflexive Encryption

• Symmetric Encryption

Roland knew that the code to his sister’s toy safe was only two digits long. He was able to crack the safe open by attempting every two-digit code until he found the correct one. What method of code-breaking did Roland use?

• Frequency analysis

• Brute force

• Frequency distribution

• Using a dictionary

Marsha found her sister’s diary that listed all of her passwords. However, it wasn’t listed for which site the passwords were used. She tried each password listed until she was able to log into her sister’s computer. What method of code-breaking did Marsha use?

• Frequency analysis

• Brute force

• Frequency distribution

• Using a dictionary

Which statement is true about the Vigenère cipher?

• The Vigenère cipher uses complex mathematical algorithms to encrypt messages.

• You can use letter frequency analysis to crack a message encrypted with a Vigenère cipher.

• The Vigenère cipher is easier to crack than the Caesar cipher.

• The Vigenère cipher utilizes more than one shift value dependent on a keyword.