cryptography

What is the primary purpose of encryption?

• To render intercepted data illegible

• To prevent interception of data

• To make data transmission faster

• To eliminate all forms of attacks

What does Auguste Kerckhoffs’ principle state about cryptographic algorithms?

• They should be public and withstand scrutiny

• They must remain secret to be secure

• They must change frequently to prevent attacks

• They should only be shared within trusted networks

What is the difference between stream ciphers and block ciphers?

• Stream ciphers process one bit at a time, while block ciphers process blocks of bits

• Stream ciphers use long keys, while block ciphers use short keys

• Stream ciphers are slower than block ciphers

• Block ciphers provide no error propagation

Which cryptographic algorithm is considered the most common block cipher?

• AES

• RSA

• SHA-256

• DES

What type of encryption uses different keys for encryption and decryption?

• Asymmetric encryption

• Symmetric encryption

• Stream encryption

• Block encryption

Which of the following is NOT a characteristic of stream ciphers?

• Processes blocks of data

• Fast encryption and decryption

• No error propagation

• Requires synchronization between sender and receiver

What is a potential weakness of symmetric encryption?

• Key establishment between parties is challenging

• It requires a public and private key pair

• It cannot handle large amounts of data

• It only works with block ciphers