Cryptography

What is the term used to describe the science of making and breaking secret codes?

• cryptology

• impersonation

• spoofing

• factorization

Which type of cipher is able to encrypt a fixed-length block of plaintext into a 128-bit block of ciphertext at any one time?

• hash

• symmetric

• block

• stream

Which three devices represent examples of physical access controls?

• firewalls

• locks

• routers

• All of Above

What encryption algorithm uses the same pre-shared key to encrypt and decrypt data?

• hash

• one-time pad

• symmetric

• asymmetric

What type of cipher encrypts plaintext one byte or one bit at a time?

• block

• enigma

• hash

• stream

What encryption algorithm uses one key to encrypt data and a different key to decrypt data?

• symmetric

• transposition

• one-time pad

• asymmetric

two private keys are required in the following cipher

• caesar

• vigenere

• symmetrical

• asymmetrical

In Cryptography, the original message, before being transformed, is called

• Simple Text

• Plain Text

• Cipher Text

• Filled Text

_______ is the science and art of transforming messages to make them secure and immune to attacks.

• Cryptography

• Cryptoanalysis

• neither Cryptography nor Cryptoanalysis

• either Cryptography or Cryptoanalysis

The art and science of breaking the cipher text is known as

• Cryptanalysis

• Cryptography

• Staganography

• Watermarking