Level 5 - Crypto Quiz 2 of 2

What is the key difference between obfuscation and encryption in the context of data confidentiality?

• A. Obfuscation is more secure than encryption.
• B. Encryption changes the data, while obfuscation makes it difficult to understand without changing the data itself.
• C. Obfuscation is faster than encryption.
• D. Encryption is a form of obfuscation.

What is the main issue with the availability of data when encryption is implemented?

• A. Encryption always corrupts data.
• B. Encryption can slow the availability of data.
• C. Encrypted data can't be decrypted.
• D. Encrypted data cannot be stored on cloud.

Which encryption approach is fast and efficient for bulk data encryption?

• A. Asymmetric encryption
• B. Hashing
• C. Symmetric encryption
• D. Obfuscation

What is the major weakness in Microsoft's Encrypting File System (EFS)?

• A. It uses a hybrid cryptosystem.
• B. The user's private key is essentially their user password.
• C. It uses symmetric encryption for bulk data.
• D. It uses hashing for message integrity.

What is a digital signature?

• A. A type of encryption key
• B. A combination of asymmetric encryption and hashing values
• C. A type of hashing algorithm
• D. A secret code used to decrypt data

What is the process of hiding ciphertext inside a media file known as?

• A. Encryption
• B. Hashing
• C. Steganography
• D. Asymmetric Encryption

What is a Trusted Platform Module (TPM)?

• A. A type of asymmetric encryption
• B. A hardware chip on the motherboard that can generate and store cryptographic keys
• C. A type of hardware security module (HSM)
• D. A software program used for data encryption

In what form do Hardware Security Modules (HSM) traditionally come?

• A. A type of encryption algorithm
• B. A software program
• C. A plug-in card or an external security device attached to a computer system
• D. A form of hashing algorithm

How does a digital signature confirm message integrity and sender authenticity?

• A. By comparing the hash values of the sender and the recipient
• B. By comparing the two hash values of the message received
• C. By comparing the digital certificate and the message received
• D. By comparing the encrypted message and the decrypted message

What is the major concern related to the reuse of encryption keys?

• A. It decreases the speed of encryption
• B. It increases the entropy of the keys
• C. It increases the likelihood of the key being cracked
• D. It decreases the length of the keys.