Cryptography Quiz

What is cryptography primarily used for?

• Converting readable text into an unreadable format that only someone with the key can understand

• Creating digital signatures for physical documents

• Enhancing the speed of computer networks

• Generating random passwords for users

What do cryptographic tools help to protect?

• The integrity of data and confidential information from unauthorized viewing

• The physical security of computer hardware

• The speed of data processing

• The user interface design of software applications

What is the difference between symmetric and asymmetric encryption?

• Symmetric encryption uses one key, while asymmetric encryption uses a public/private key pair

• Symmetric encryption is faster than asymmetric encryption, which is not secure

• Asymmetric encryption can only encrypt data, while symmetric encryption can only decrypt data

• Symmetric encryption uses passwords, while asymmetric encryption uses digital signatures

What is a digital signature used for?

• To verify the sender and integrity of an email message

• To encrypt a message so that only the recipient can read it

• To increase the storage capacity of emails

• To create a unique password for each email account

What is required to create a digital signature?

• The recipient's public key

• The sender's private key

• Your own private key

• Someone else's private key

What is the key length of the Data Encryption Standard (DES)?

• 56-bit

• 168-bit

• 256-bit

• 64-bit

Which of the following is NOT a characteristic of hashing?

• It is a reversible process

• It cannot be reversed once a hash is generated

• It is used to verify the integrity and authenticity of data

• It maps data of any size

What is key stretching used for?

• To reverse a hash

• To encrypt a password

• To make it harder to crack hashes

• To reduce the size of the data

What is the purpose of using key stretching with weak passwords?

• To reduce the number of resources required to break the password

• To convert the weak password into a hash

• To make the password easier to guess

• To increase the resources required to break the password and make it more secure

What is added to a password during the salting process to make it more secure?

• A hash

• Random data

• The same salt for every password

• A dictionary of common passwords