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Questions and Answers
What is the purpose of the secret key in encryption?
What is the purpose of the secret key in encryption?
- To decrypt the ciphertext (correct)
- To transform the plaintext to the ciphertext
- To generate the ciphertext
- To choose the encryption algorithm
What is the primary function of the decryption algorithm?
What is the primary function of the decryption algorithm?
- To scramble the message
- To create the ciphertext
- To produce the original plaintext (correct)
- To encrypt the plaintext
What is the main characteristic of the Caesar cipher?
What is the main characteristic of the Caesar cipher?
- Involves simple mapping or substitution (correct)
- Uses a secret key for encryption
- Operates using a transposition technique
- Produces random stream of data
What does the substitution technique in cryptography involve?
What does the substitution technique in cryptography involve?
What is the basic idea of a transposition cipher?
What is the basic idea of a transposition cipher?
How does the Columnar Transposition technique rearrange the plaintext?
How does the Columnar Transposition technique rearrange the plaintext?
What is the recipient required to know in order to decrypt a message encrypted using Columnar Cipher?
What is the recipient required to know in order to decrypt a message encrypted using Columnar Cipher?
What is the purpose of choosing a key in the encryption process of Columnar Cipher?
What is the purpose of choosing a key in the encryption process of Columnar Cipher?
How many rows are needed for the Rail Fence cipher with a keyword of six letters?
How many rows are needed for the Rail Fence cipher with a keyword of six letters?
What is the key in the Rail Fence cipher?
What is the key in the Rail Fence cipher?
Which cipher rearranges the characters of a message based on a pattern resembling a zigzag or rail fence?
Which cipher rearranges the characters of a message based on a pattern resembling a zigzag or rail fence?
How is the plaintext 'DEFEND THE EAST WALL' encrypted using the Rail Fence cipher?
How is the plaintext 'DEFEND THE EAST WALL' encrypted using the Rail Fence cipher?
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