Cryptography

ciphertext

• data that has been encrypted

• plain text that is readable

• a type of encryption algorithm

• a method of data compression

Cryptanalysis

• Study of creating new encryption algorithms

• Study of a cryptographic system in order to break the code and return the encrypted text back to plaintext

• Study of network security protocols

• Study of data compression techniques

the base of a binary number

• 1

• 2

• 3

• 10

Enigma

• a machine used in WWII that used a rotor to randomly generate pads as the basis of their encryption.

• a type of code used by spies in the 19th century.

• a device for decoding messages in the Cold War.

• a computer used for weather forecasting in the 1940s.

The hexadecimal 13 is what in decimal?

• 19

• 20

• 18

• 21

Plaintext

• encrypted data

• decrypted data

• raw data

• compressed data

Cribs

• Commonly used short words in the English language that can help in frequency analysis and in cracking a substitution cipher

• A type of bed for infants

• A slang term for a house or apartment

• A method of encryption used in computer science

substitution encryption

• When you replace a character with a different character

• When you rearrange the characters in a message

• When you encode a message using numbers

• When you use the same character for different letters

Encryption

• a way to conceal information by altering it so that it appears to be random data.

• A method to speed up data transmission.

• A technique for compressing files.

• A process to delete sensitive information.

E and T

• The most frequently used words in the English language

• The least frequently used words in the English language

• Commonly used conjunctions

• The most complex words in the English language