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WorksheetsEncryption 2
Total questions: 10
Worksheet time: 6mins
What is the algorithm of ceasar's cipher?
Each letter is replaced with a particular symbol
Each letter is replaced with a letter a certain number of steps down the alphabet
Each letter is replaced with a particular number from 0 to 26, and numbers are replaced with letters.
Each letter is replaced with a completely random number
What is symmetric encryption?
When users use the same key to encrypt communication.
When users use the same line of communication.
When users use the same operating systems.
When users use the same font in messages
The process of converting plaintext to ciphertext.
cryptography
cyphertext
decryption
encryption
A string of text that has been converted to a secure form using encryption.
encryption
decryption
ciphertext
plaintext
hello has been encrypted with Caesar cipher to khoor. The key used was:
abc
3
2
xyz
Consider the process of encoding and decoding a message using the following Caesar cipher encoding scheme in which the plaintext and ciphertext alphabets are offset by four positions, as shown below:
Plaintext: a b c d e f g h i j k l m n o p q r s t u v w x y z
Ciphertext: w x y z a b c d e f g h i j k l m n o p q r s t u v
Which of the following encoded ciphertext strings decodes to an original plaintext message of "secret"?
etsecr
wigvix
kwujwl
oaynap
