What is meant by encryption?
Encoding a message so that it cannot be understood by anyone other than its intended recipient
Abbreviating data for quicker entry into a computer system
Password protecting a file
Why are TV transmissions encrypted?
To stop adverts being shown
To prevent children from watching certain shows
To prevent non-subscibers from watching TV shows
What is plaintext?
Plaintext is the understandable, readable version of a message
Plaintext is an encrypted message
Plaintext is a form of encryption
What is ciphertext?
Ciphertext is the understandable, readable version of a message
Ciphertext is encrypted plaintext
Ciphertext is a message that has been decrypted
What protocol is used to encrypt sensitive data like credit card information on the internet?
HTTPS
TCP/IP
POP3
What is the Caesar cipher?
A simple encryption method that involves replacing each letter in a message with one ahead or behind in the alphabet
A complex encryption method using two keys
A way of password protecting a file
What is the ciphertext for "computer science" when a Caesar cipher with a key value of +three is used?
eqorwvgt uekgpeg
frpsxwhu vflhqfh
iusvazkx yioktik
What is the opposite of encryption?
Ciphertext
Symmetric
Decryption
What does an encryption key do?
It intercepts data packets on the internet
It scrambles plaintext into an unreadable form, or unscrambles ciphertext
It authenticates data
What is the key value in this encrypted message - lipps asvph?
+6
-4
+4