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04 - Cipher, plain text, ciphertext

 1. Encryption is the process of encoding information so that it cannot be accessed by an unauthorised person.
cipher_q1.jpg

  TRUE

  FALSE

 2. Encryption protects information by making it …

  invisible

  untraceable

  unintelligible

  indivisible

 3. The original information, before encryption, is known as …

  plaintext

  normaltext

  uncodedtext

  standardtext

 4. Encrypted information is known as …

  codetext

  teletext

  cryptotext

  ciphertext

 5. The algorithm used to encrypt the information is known as a …

  name

  book

  cipher

  maze

 6. The algorithm will use a key to encrypt and decrypt information.

  FALSE

  TRUE

 7. The key is usually a …

  series of pixels

  large number

  physical metal key

   cover to hide the data

 8. The encrypted information could be decrypted without the key but this would take a computer an extremely long time.

  TRUE

  FALSE

 9. Security is improved by using a longer key.

  TRUE

  FALSE

 10. Is the information (pictured) more likely to be a plaintext, ciphertext or key?
cipher_q10.jpg

  key

  ciphertext

  plaintext

  none of these options


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