Cisco Cybersecurity Essentials 18.2-3

Multiple Choice

Which of the following is a technique used in data masking to protect sensitive information?

• Substitution

• Encryption

• Compression

• Replication

Multiple Choice

Which of the following components is NOT typically involved in the process of hiding data using steganography?

• Embedded data

• Cover-text

• Stego key

• Encryption algorithm

Multiple Choice

Which of the following best describes the main advantage of steganography over cryptography?

• Steganography makes the message unreadable without a key.

• Steganography does not attract special attention to the secret message.

• Steganography uses complex algorithms to hide data.

• Steganography is faster than cryptography.

Multiple Select

Which of the following statements about social steganography is/are correct?

• It hides information in plain sight using agreed rules or definitions.

• It is commonly used by teens on social media to communicate secretly.

• It relies on misspelling words or obscure references to convey hidden messages.

• It requires advanced computer skills to implement.

Multiple Choice

Which of the following is NOT one of the four elements of secure communications?

• Data Integrity

• Data Encryption

• Origin Authentication

• Data Non-Repudiation

Multiple Select

Which properties must a cryptographic hash function possess?

• The input can be any length

• The output has a fixed length

• The function is reversible

• The function is collision free

Multiple Choice

What is the main advantage of using HMAC over a simple hash function for origin authentication?

• HMAC uses a public key for hashing

• HMAC combines a hash function with a secret key, providing authentication and defeating man-in-the-middle attacks

• HMAC is faster than regular hash functions

• HMAC produces longer hash values

Multiple Choice

Which of the following best describes the purpose of using HMAC in origin authentication, as illustrated in the figures?

• To encrypt the message content for confidentiality

• To ensure the message has not been altered and verify the sender's identity

• To compress the message for faster transmission

• To generate random keys for secure communication

Multiple Choice

Which of the following is NOT a data masking technique mentioned in the lesson?

• Encryption

• Substitution

• Shuffling

• Nulling out