Security Concepts Quiz

Which of the following is NOT a property of a dependable system?

• Availability

• Confidentiality

• Scalability

• Integrity

Confidentiality ensures that information is disclosed only to:

• All users in the system

• Authorized parties

• System administrators

• External auditors

What is the primary purpose of encryption?

• To ensure data can only be modified by authorized users

• To make data unreadable to unauthorized users

• To verify the identity of the sender

• To monitor unauthorized access

Which security mechanism verifies a claimed identity?

• Authentication

• Authorization

• Encryption

• Auditing

What is the function of a firewall in a secure system?

• To prevent all incoming and outgoing traffic

• To block all connections by default and allow only permitted ones

• To encrypt all network traffic

• To monitor and audit data usage

The principle of 'Least Privilege' means:

• A user should have access to all system components

• A process should run with the fewest possible privileges

• Every user must authenticate twice

• Only the administrator can access critical resources

The cryptographic process of transforming plaintext into ciphertext is known as:

• Decryption

• Authentication

• Hashing

• Encryption

In asymmetric cryptography, the public key is used for:

• Encrypting data

• Decrypting data

• Generating hash values

• Ensuring data redundancy

A hash function:

• Produces a fixed-length output from variable-length input

• Encrypts data for confidentiality

• Requires a secret key for decryption

• Provides end-to-end encryption

The Diffie-Hellman algorithm is used for:

• Encrypting data at rest

• Secure key exchange

• Authenticating digital certificates

• Generating cryptographic hashes