D431 Digital Forensics in Cybersecurity - Set 1 - Part 1

Correct Answer: Feistel function

The Feistel function is used in many symmetric block ciphers and splits the data into two parts. This method is widely used in encryption algorithms such as DES.

Correct Answer: ASCII

ASCII is a standard set of codes for representing characters on a computer, including letters, numbers, and special characters.

Correct Answer: Brute-force attack

A brute-force attack attempts to decrypt a message by trying all possible keys in the keyspace until the correct one is found.

Correct Answer: Decryption

Decryption is the process of converting encrypted data (ciphertext) back into its original form (plaintext) using a key.

Correct Answer: Demonstrative evidence

Demonstrative evidence is used to help explain other evidence, often in the form of visual aids like charts.

Correct Answer: Logic bomb

A logic bomb is a type of malware that executes malicious actions when a specific condition is met, such as a date or event.

Correct Answer: Basic Input/Output System

BIOS stands for Basic Input/Output System and is responsible for booting up the computer and initializing the hardware.

Correct Answer: Caesar cipher

The Caesar cipher shifts letters by a fixed number in the alphabet. It is a basic form of substitution cipher.

Correct Answer: ESN

The Electronic Serial Number (ESN) is a unique number developed by the FCC to identify cell phones.

Correct Answer: Volatile data

Volatile data is data that changes rapidly and is often lost when the system is powered off, such as information stored in RAM.

Correct Answer: Steganography

Steganography is the practice of hiding messages within other files, such as images or audio files, to avoid detection.

Correct Answer: To track the control of evidence from collection to court presentation

The chain of custody ensures that evidence is properly handled and documented from the time it is collected to when it is presented in court.

Correct Answer: Symmetric cryptography

Symmetric cryptography uses the same key for both encryption and decryption, unlike asymmetric cryptography, which uses two different keys.

Correct Answer: Encryption

Encryption is the process of converting plaintext into ciphertext using a key to prevent unauthorized access.

Correct Answer: Internet Message Access Protocol

IMAP stands for Internet Message Access Protocol, which is used to retrieve email messages from a server.

Correct Answer: The total number of possible keys

The key space refers to the total number of possible keys that could be used in an encryption algorithm.

Correct Answer: Privacy Protection Act

The Privacy Protection Act protects journalists from being forced to hand over materials before they are published or disseminated to the public.

Correct Answer: To monitor network traffic for suspicious activity

An IDS monitors network traffic in real-time, looking for suspicious activities that could indicate a security breach.

Correct Answer: It contains precalculated hash values for passwords

Rainbow tables are used in password cracking by storing precalculated hash values for potential passwords, speeding up the decryption process.

Correct Answer: LSB (Least Significant Bit)

The Least Significant Bit (LSB) method involves modifying the least significant bits of image pixels to hide data without noticeable changes to the image.