Computer Knowledge ยท General Awareness
Information Security
4,143 Questions
Information security involves protecting computer systems and data from unauthorized access, cyber threats, and damage. It is a core part of the computer knowledge section in various banking and government exams. Practicing these concepts helps in understanding digital signatures, network security, and access control effectively.
Cybersecurity threatsAccess controlCryptography basicsSecurity risk managementDatabase protection
Information Security Questions
Which technology is used for secure communication among disaster response teams?
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Encrypted messaging apps
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Satellite phones
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Mesh networks
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All of the above
D
Correct answer
Explanation
Encrypted messaging apps, satellite phones, and mesh networks are all technologies used for secure communication among disaster response teams.
Which of the following is a common application of number theory in cryptography?
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Public-key cryptography
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Symmetric-key cryptography
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Hash functions
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Digital signatures
A
Correct answer
Explanation
Public-key cryptography, also known as asymmetric cryptography, is a cryptographic system that uses a pair of keys, a public key and a private key, to encrypt and decrypt messages.
Which of these is an example of a number-theoretic algorithm used in practice?
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RSA algorithm
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Diffie-Hellman key exchange
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Elliptic curve cryptography
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All of the above
D
Correct answer
Explanation
The RSA algorithm, Diffie-Hellman key exchange, and elliptic curve cryptography are all examples of number-theoretic algorithms that are widely used in practice for secure communication and data protection.
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A scam in which criminals send emails or text messages that look like they are from legitimate companies.
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A scam in which criminals create fake websites that look like legitimate websites.
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A scam in which criminals install malware on your computer that steals your personal information.
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All of the above
D
Correct answer
Explanation
Phishing scams are scams in which criminals send emails or text messages that look like they are from legitimate companies, create fake websites that look like legitimate websites, or install malware on your computer that steals your personal information.
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A scam in which criminals send emails or text messages that look like they are from legitimate companies.
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A scam in which criminals create fake websites that look like legitimate websites.
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A scam in which criminals install malware on your computer that steals your personal information.
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All of the above
C
Correct answer
Explanation
Malware scams are scams in which criminals install malware on your computer that steals your personal information.
Which of the following is a common cloud security threat?
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Malware attacks
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Phishing attacks
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DDoS attacks
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All of the above
D
Correct answer
Explanation
Malware attacks, phishing attacks, and DDoS attacks are all common cloud security threats.
Which of the following is a symmetric encryption algorithm?
A
Correct answer
Explanation
AES (Advanced Encryption Standard) is a symmetric encryption algorithm, meaning that the same key is used for both encryption and decryption.
What is the purpose of a hashing function?
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To encrypt data
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To generate a digital signature
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To create a one-way hash value
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To compress data
C
Correct answer
Explanation
A hashing function takes an input of any size and produces a fixed-size output, called a hash value. Hash values are used to verify the integrity of data, as any change to the input data will result in a different hash value.
Which of the following is an asymmetric encryption algorithm?
B
Correct answer
Explanation
RSA (Rivest-Shamir-Adleman) is an asymmetric encryption algorithm, meaning that different keys are used for encryption and decryption.
What is the purpose of a digital signature?
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To encrypt data
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To generate a hash value
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To authenticate the sender of a message
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To compress data
C
Correct answer
Explanation
A digital signature is a mathematical scheme used to authenticate the sender of a message. It allows the receiver to verify that the message came from the sender and that it has not been tampered with.
Which of the following is a common method for generating a random key for encryption?
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Using a pseudo-random number generator
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Using a hardware random number generator
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Using a combination of both
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None of the above
C
Correct answer
Explanation
A combination of a pseudo-random number generator and a hardware random number generator is often used to generate a random key for encryption, as this provides a high level of security.
Which of the following is an example of a symmetric encryption algorithm?
A
Correct answer
Explanation
AES (Advanced Encryption Standard) is an example of a symmetric encryption algorithm.
What is the purpose of a salt in cryptography?
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To make the encryption algorithm more secure
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To make the encryption algorithm faster
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To make the encryption algorithm easier to implement
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None of the above
A
Correct answer
Explanation
A salt is a random value that is added to the input of a hashing function before the hash value is generated. This makes it more difficult for an attacker to guess the hash value, even if they know the input.
Which of the following is an example of an asymmetric encryption algorithm?
B
Correct answer
Explanation
RSA (Rivest-Shamir-Adleman) is an example of an asymmetric encryption algorithm.
Which of the following is an example of a block cipher?
A
Correct answer
Explanation
AES (Advanced Encryption Standard) is an example of a block cipher.