AP CSP Unit 4 code.org

Fill in the blank of the following statement: "______ encryption is a method of encryption involving one key for both encryption and decryption."

• Symmetric
• Asymmetric 
• Public key 
• SSL 

A coffee shop is considering accepting orders and payments through their phone app and have decided to use public key encryption to encrypt their customers' credit card information. Is this a secure form of payment?

• No, public key encryption allows the credit card information to be read by the public. 
• No, the internet protocols are open standards and thus everything sent over the internet is sent "in the clear". 
• Yes, public key encryption is built upon computationally hard problems that even powerful computers cannot easily solve. 
• Yes, public key encryption is secure because it transmits credit card information in binary. 

Which of the following statements best describes the properties of public key encryption?

• Public key encryption is an encryption method which relies on separate keys for encrypting and decrypting information. 
•  Public key encryption is a highly secure encryption scheme that in which a single shared key is used by both the sender and receiver of the message. 
• Public key encryption makes use of certain types of problems which are easier for humans to solve than computers. 
• Public key encryption makes use of mathematical problems which no algorithm can be used to solve. 

the generic term for a technique (or algorithm) that performs encryption

• Cipher
• Cracking encryption
• Caesar Cipher
• Caesar Cipher

a process that reverses encryption, taking a secret message and reproducing the original plain text

• Decryption
• Encryption
• Cracking encryption
• Cipher

a process of encoding messages to keep them secret, so only "authorized" parties can read it.

• Decryption
• Encryption
• Cracking encryption
• Random Substitution Cipher

an encryption technique that maps each letter of the alphabet to a randomly chosen other letters of the alphabet.

• Random Substitution Cipher
• Encryption
• Cracking encryption
• Cipher

used in public key encryption, it is scheme in which the key to encrypt data is different from the key to decrypt

• asymmetric encryption
• modulo
• Private Key
• Public Key Encryption

a mathematical operation that returns the remainder after integer division. Example: 7 MOD 4 = 3

• asymmetric encryption
• modulo
• Private Key
• Public Key Encryption

In an asymmetric encryption scheme the decryption key is kept private and never shared, so only the intended recipient has the ability to decrypt a message that has been encrypted with a public key

• asymmetric encryption
• modulo
• Private Key
• Public Key Encryption