INFORMATION SECURITY SKILL ASSESSMENT

What is a symmetric key algorithm?

• A symmetric key algorithm uses different keys for encryption and decryption.

• A symmetric key algorithm is an encryption method that uses the same key for both encryption and decryption.

• A symmetric key algorithm is a type of hashing function used for data integrity.

• A symmetric key algorithm is a method that requires multiple keys for secure communication.

Name two examples of symmetric key algorithms.

• RSA

• AES, DES

• SHA-256

• Blowfish

How does the key length affect the security of symmetric key algorithms?

• All key lengths provide the same level of security regardless of their size.

• Key length has no impact on the security of symmetric algorithms.

• Longer key lengths provide greater security by increasing the difficulty of brute-force attacks.

• Shorter key lengths are more secure due to less complexity.

What is an asymmetric key algorithm?

• An asymmetric key algorithm is a cryptographic method that uses a pair of keys for secure data transmission.

• An asymmetric key algorithm is a type of hashing function used for data integrity.

• A symmetric key algorithm uses a single key for encryption and decryption.

• An asymmetric key algorithm is a method that does not require any keys for data security.

Explain the difference between public and private keys in asymmetric encryption.

• Public keys are used for decryption and must be kept secret.

• Both keys are used for encryption and can be shared publicly.

• Public keys are used for encryption and can be shared openly, while private keys are used for decryption and must be kept secret.

• Private keys can be shared openly for encryption purposes.

What is the purpose of a hash function in cryptography?

• To compress data for faster storage.

• To encrypt data for secure transmission.

• To generate random keys for encryption.

• The purpose of a hash function in cryptography is to ensure data integrity and verify authenticity.

Name a commonly used hash function and describe its properties.

• SHA-1

• SHA-256

• MD5

• BLAKE2

What is a digital signature and how does it work?

• A digital signature is a software tool for editing documents.

• A digital signature is a method for creating digital art.

• A digital signature is a type of physical signature used on paper documents.

• A digital signature is a cryptographic method used to verify the authenticity and integrity of a digital message or document.

How do digital signatures ensure the integrity of a message?

• Digital signatures are used to create a backup of the message.

• Digital signatures ensure integrity by allowing the recipient to verify that the message has not been altered during transmission.

• Digital signatures encrypt the message to ensure privacy.

• Digital signatures automatically delete the original message after sending.

What are the main differences between encryption and hashing?

• Both encryption and hashing are reversible processes.

• Hashing can be decrypted to retrieve the original data.

• Encryption is reversible and used for confidentiality; hashing is irreversible and used for integrity.

• Encryption is used for integrity; hashing is used for confidentiality.