Podcast
Questions and Answers
What term is used for the original message before encryption?
What term is used for the original message before encryption?
- Cipher
- Key
- Plaintext (correct)
- Ciphertext
Which encryption type was the only one in use before the introduction of asymmetric encryption?
Which encryption type was the only one in use before the introduction of asymmetric encryption?
- Public-key encryption
- Symmetric encryption (correct)
- Conventional encryption
- Cryptanalysis
What is the term for the study of principles/methods of deciphering ciphertext without knowing the key?
What is the term for the study of principles/methods of deciphering ciphertext without knowing the key?
- Cryptology (correct)
- Ciphertext analysis
- Symmetric encryption
- Decryption
Who first publicly proposed Public-key encryption?
Who first publicly proposed Public-key encryption?
What does cryptanalysis involve?
What does cryptanalysis involve?
What does encipher refer to in cryptography?
What does encipher refer to in cryptography?
What is a characteristic of the Vigenère cipher?
What is a characteristic of the Vigenère cipher?
What is the purpose of repeating the keyword in the Vigenère cipher?
What is the purpose of repeating the keyword in the Vigenère cipher?
Who invented the Playfair Cipher?
Who invented the Playfair Cipher?
What is the key matrix in the Playfair Cipher based on?
What is the key matrix in the Playfair Cipher based on?
How does the Playfair Cipher handle repeated letters in encryption?
How does the Playfair Cipher handle repeated letters in encryption?
Which cipher is known for encrypting multiple letters at once to improve security?
Which cipher is known for encrypting multiple letters at once to improve security?
What is the main difference between public-key cryptography and symmetric key encryption?
What is the main difference between public-key cryptography and symmetric key encryption?
Which of the following is NOT a consequence of using two keys in public-key cryptography?
Which of the following is NOT a consequence of using two keys in public-key cryptography?
What is the general goal of cryptanalytic attacks?
What is the general goal of cryptanalytic attacks?
How does a brute-force attack differ from a cryptanalytic attack?
How does a brute-force attack differ from a cryptanalytic attack?
What factor determines the time required for a brute-force attack?
What factor determines the time required for a brute-force attack?
How does the time required for a brute-force attack change with an increase in key size?
How does the time required for a brute-force attack change with an increase in key size?
What is the mathematical representation of the Caesar cipher transformation?
What is the mathematical representation of the Caesar cipher transformation?
What is the main disadvantage of the Caesar cipher in terms of security?
What is the main disadvantage of the Caesar cipher in terms of security?
In cryptanalysis of the Caesar cipher, what method can be used to decode the ciphertext?
In cryptanalysis of the Caesar cipher, what method can be used to decode the ciphertext?
What technique involves replacing plaintext letters with other letters, numbers, or symbols?
What technique involves replacing plaintext letters with other letters, numbers, or symbols?
How many characters are there in a permutation of a finite set of elements?
How many characters are there in a permutation of a finite set of elements?
What transformation replaces each letter with the 3rd letter that follows it in the alphabet?
What transformation replaces each letter with the 3rd letter that follows it in the alphabet?
How many permutations are there for a set with elements {a, b, c}?
How many permutations are there for a set with elements {a, b, c}?
What does a monoalphabetic cipher do?
What does a monoalphabetic cipher do?
Why is it incorrect to assume that a monoalphabetic cipher with 26! keys is secure?
Why is it incorrect to assume that a monoalphabetic cipher with 26! keys is secure?
What is one of the reasons why English text is vulnerable to cryptanalysis?
What is one of the reasons why English text is vulnerable to cryptanalysis?
In the given ciphertext 'UZQSOVUOHXMOPVGPOZPEVSGZWSZOPFPESXUDBMETSXAIZ', what letters are most likely to represent 'e' and 't'?
In the given ciphertext 'UZQSOVUOHXMOPVGPOZPEVSGZWSZOPFPESXUDBMETSXAIZ', what letters are most likely to represent 'e' and 't'?
What is the main challenge faced in cryptanalysis when analyzing the given ciphertext?
What is the main challenge faced in cryptanalysis when analyzing the given ciphertext?
