Midterm Exam Practice Quiz (February Online Day)

A mathematical operation that returns the remainder after integer division.

• Division

• Modulo

• Bentle

• Math

Choose the answer that is NOT a feature of Public Key Cryptography:

• A key for decrypting is never made public 
• Using public key guarantees that only the intended recipient can decrypt the message
• A Public Key database ensures 3rd party accountability of security 
• Allows secure communication without establishing a *shared* encryption key ahead of time. 

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. 

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

Used prevalently on the web, it allows for secure messages to be sent between parties without having to agree on, or share, a secret key. It uses an asymmetric encryption scheme in which the encryption key is made public, but the decryption key is kept private

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

An encryption layer of HTTP that uses public key cryptography to establish a secure connection.

• SSL/TLS
• Virus
• Antivirus Software
• Firewall

What are brute-force attacks?

• Attacks that use frequency analysis to break passwords

• Attacks that check each possible solution to break encrypted data

• Attacks against DNS servers to enable DDOS attacks

• Attacks on firewalls to gain access to a company's sensitive data

What is a symmetric key used for?

• Sending and receiving information from the web

• Encrypting data

• Decrypting data

• Encrypting and decrypting data