352CIS-3 Chapter 4 - Part 1

What is the primary function of cryptography?

Which of the following best describes symmetric encryption?

What is a key management practice essential for cryptographic systems?

Which cipher technique is primarily used in asymmetric encryption?

Cryptographic protocols are important for which purpose?

What is the main purpose of using a substitution cipher in cryptography?

Which of the following best describes transposition in cryptographic techniques?

What does symmetric encryption rely on for its secure operations?

In the context of cryptographic protocols, which aspect is primarily handled by key management?

Which of the following is NOT a characteristic of asymmetric encryption?

Cryptography is a method of secret writing.

Encryption is considered a weak defense in computer security.

The term cryptography is synonymous with the term coding.

Cryptography is only useful in protecting physical documents.

Encryption techniques can offer strong protection against unauthorized access.

The decrypted message from 'ELHLMDOYAZER' is 'HELLO MY DEAR'.

The process of decrypting a message is the same as encrypting it.

In cryptography, the substitution cipher replaces each letter with another letter.

The characters in the given message 'ELHLMDOYAZER' include numbers and special symbols.

What allows for different encryptions of the same plaintext message?

What is the main advantage of using a key in encryption?

Which statement best explains the relationship between keys and plaintext in encryption?

Which of the following statements about encryption keys is false?

What happens when you change the key used in the encryption process?

In cryptography, what does a key primarily contribute to encrypted messages?

Which of the following best describes the role of a key in encryption?

What is a direct consequence of altering the encryption key?

Which aspect of encryption does changing the key NOT affect?

Why is encryption considered more secure when a key is utilized?

Which of the following is true regarding secret keys?

In the function P = D(KD,C), what does P represent?

What does the equation P = D(KD, E(KE,P)) imply?

What role does 'C' play in the formula C = E(KE, P)?

What is the consequence of using a static key in an encryption process?

What does D(KD, C) indicate in the context of cryptography?

Which of the following statements about encryption keys is incorrect?

What is a defining characteristic of asymmetric encryption key pairs?

Which statement about key management in asymmetric encryption is false?

In asymmetric encryption, what is the primary role of the public key?

Why is it important to match keys precisely in an asymmetric encryption system?

Which of the following is a common misconception about asymmetric encryption?

What is one of the main advantages of using asymmetric encryption over symmetric encryption?

What is NOT a typical feature of key pairs in asymmetric encryption?

What is the method used in a Vernam Cipher to generate the cipher-text?

In the Vigenѐre Table, what happens when a letter 'a' from the plain-text is aligned with a letter 'b' from the keyword?

What is the primary operation performed in the Vernam Cipher during encryption?

In a transposition cipher, what is primarily altered in the message?

What key concept distinguishes the method used in the Vernam Cipher from other ciphers?

What is the significance of the modulus operation in the Vernam Cipher encryption process?

The resulting cipher-text solely depends on the original plaintext message and the key value.

In cryptography, algorithms are used for both encryption and decryption processes.

A key is defined as an irreducible component in the encryption process.

The key value in encryption has no effect on the resulting cipher-text if the plaintext remains constant.

In a typical encryption scheme, the key K can be any random string of characters.

Changing the algorithm while keeping the plaintext and key constant can alter the resulting cipher-text.

In cryptography, algorithms and keys are independent of one another.

A properly chosen key is crucial for ensuring the security of the cipher-text generated.

The process of generating cipher-text does not require an understanding of the original plaintext message.

Confusion in cryptography means that an interceptor can easily predict the changes in cipher text when a character in plain text is altered.

In the Vernam Cipher, the formula used for encryption is $ci=(pi + random number) mod 10$.

The Vigenѐre Cipher uses a keyword to encrypt messages by shifting letters based on the corresponding letters in the keyword.

Transposition ciphers primarily involve rearranging characters rather than substituting them.

In cryptography, diffusion indicates that the effect of one character change should spread across the entire cipher text.

In a transposition cipher, the position of letters in the message remains unchanged while the letters themselves are altered.

The goal of a transposition cipher is to ensure that replacing a single character in the cipher text will make it completely unpredictable.

Both confusion and diffusion are necessary principles in the security of cryptographic systems.

The Vigenѐre Table allows for any letter in the plain-text to produce the same letter in the Cipher-text regardless of the keyword.

The random numbers used in the Vernam Cipher are part of the key and must remain secret to ensure encoding security.

A transposition cipher encrypts messages by substituting each letter with another letter.

During the encryption process of the Vernam Cipher, the sum of the plain-text and random number is simply added together without any further operations.

In the context of confusion, an effective cryptographic system should allow for predictable relationships between characters.

In symmetric encryption, only the legitimate sender can produce a message that will decrypt properly with the shared key.

Authenticity in symmetric encryption is primarily ensured by the public key.

In symmetric encryption, the key management process does not impact the security of the encryption.

The decryption process in symmetric encryption is solely dependent on the ciphertext, ignoring the key.

Only one individual is typically responsible for handling key management in symmetric encryption.

Symmetric encryption can be efficiently implemented without a need for key distribution mechanisms.

In symmetric encryption, if the key is known to both the sender and receiver, the message can be decrypted accurately.

The legitimacy of the sender in symmetric encryption does not influence the ability to decrypt the message.