AP CSP Unit 4 Review

Which of the following most accurately describes Moore's Law:

• Moore's Law describes a relationship of boolean logic statements involving AND and OR

• Moore's Law is the principle that one should assume that any traffic on the Internet is insecure

• Moore's Law is the observation that computing power tends to double every two years

• Moore's Law explains why cracking modern cryptography is a "computationally hard" problem

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.

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.

What is a Distributed Denial of Service (DDoS) attack?

• A coordinated effort by a group to simultaneously attempt to gain entry to foreign government's servers or systems

• An effort by network engineers to focus all systems on catching a user or computer that has illegally gained access.

• An attempt to compromise a single target by flooding it with requests from multiple systems.

• An attempt to harass or extort all customers of one or more Internet Service Providers (ISPs).

Which of the following scenarios is most characteristic of a phishing attack.

• You accidentally run a piece of code that automatically spreads from one computer to another, exploiting a common vulnerability

• You get an email from the IT support desk that asks you to send a reply email with your username and password to verify your account

• You get an unwanted email trying to sell you a low quality product or service that seems "fishy."

• You accidentally install a piece of software that monitors your activity to steal personal information like your passwords, date of birth, social security number, etc.

If your message is encrypted using public key encryption it is _________________ to crack.

• impossible
• relatively easy
• computationally hard

Which of the following is a real one-way function that is used for asymmetric encryption?

• Division
• Multiplication
• Modulo
• Remainder

The key for a random substitution cipher is 

• a number
• an alphanumeric string
• a mapping of the letters of the alphabet to other letters
• two keys, a public and a private