CSCB223 Cryptography: Symmetric Encryption Quiz

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What is the primary purpose of cryptography in information security?

To ensure the confidentiality of information

To provide authentication services

To ensure the integrity of information

All of the above (correct)

What cryptographic technique is used to protect the confidentiality of information?

Encryption algorithms (correct)

Hashing algorithms

Digital signatures

Message digests

Which of the following cryptographic primitives is used to ensure the integrity of information?

Hashing algorithms and message digests (correct)

Digital signatures

Encryption

Public Key Infrastructure (PKI)

What cryptographic service is used to provide authentication and non-repudiation?

Digital signatures and digital certificates Signup and view all the answers

Which of the following is a real-world example of a data breach involving cryptography?

The Marriott data breach Signup and view all the answers

What is the primary role of a cryptographer?

To design and implement encryption algorithms Signup and view all the answers

What is the fundamental difference between symmetric and public key cryptosystems?

Symmetric cryptosystems use a single key, while public key cryptosystems use two different keys. Signup and view all the answers

Which of the following is NOT a fundamental security service provided by cryptography?

Key management Signup and view all the answers

What is the purpose of using a secret encryption key (Ke) in the encryption process $C = E(Ke, P)$?

To ensure the confidentiality of the plaintext Signup and view all the answers

Which of the following is NOT a type of security attack?

Key management attack Signup and view all the answers

What is the purpose of using a secret decryption key (Kd) in the decryption process $P = D(Kd, C)$?

To provide authentication of the recipient Signup and view all the answers

What is the purpose of using a cryptographic algorithm (E and D) in the encryption and decryption processes?

To ensure the integrity of the ciphertext Signup and view all the answers

What is the primary goal of cryptography?

To design and analyze mechanisms that provide fundamental security services Signup and view all the answers

What is the purpose of a secret key in symmetric encryption?

To scramble the plaintext before transmission and unscramble it upon reception Signup and view all the answers

What is the primary difference between cryptography and cryptanalysis?

Cryptography aims to keep messages secret, while cryptanalysis aims to break encryption Signup and view all the answers

What is the primary role of a cryptographer?

To design and analyze mechanisms that provide fundamental security services Signup and view all the answers

What is the primary goal of cryptanalysis?

To retrieve the plaintext from the ciphertext without knowing the proper key Signup and view all the answers

What is the primary objective of a cryptosystem?

To ensure the confidentiality and integrity of transmitted data Signup and view all the answers

CSCB223 Cryptography: Symmetric Encryption Quiz

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Questions and Answers

What is the primary purpose of cryptography in information security?

What cryptographic technique is used to protect the confidentiality of information?

Which of the following cryptographic primitives is used to ensure the integrity of information?

What cryptographic service is used to provide authentication and non-repudiation?

Which of the following is a real-world example of a data breach involving cryptography?

What is the primary role of a cryptographer?

What is the fundamental difference between symmetric and public key cryptosystems?

Which of the following is NOT a fundamental security service provided by cryptography?

What is the purpose of using a secret encryption key (Ke) in the encryption process $C = E(Ke, P)$?

Which of the following is NOT a type of security attack?

What is the purpose of using a secret decryption key (Kd) in the decryption process $P = D(Kd, C)$?

What is the purpose of using a cryptographic algorithm (E and D) in the encryption and decryption processes?

What is the primary goal of cryptography?

What is the purpose of a secret key in symmetric encryption?

What is the primary difference between cryptography and cryptanalysis?

What is the primary role of a cryptographer?

What is the primary goal of cryptanalysis?

What is the primary objective of a cryptosystem?

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