Questions

Now it's time to check your knowledge. Select the best response, then check your answers, found in the Assessment section at the end of the book:

1. The ___ used a carefully constructed block of wood and a thin strip of parchment with lettering on the parchment to conceal information.

   a. Enigma

   b. Blaise

   c. scytale

   d. Prussian

2. A monoalphabetic _____ cipher uses a single alphabet and substitutes one letter or character for another. Characters can include letters and special characters, along with punctuation marks.

   a. allocation

   b. substitution

   c. transposition

   d. Blaise

3. An example of a polyalphabetic cipher is the _____ cipher, which uses more than one alphabet to encode text.

   a. Vigenère

   b. Caesar

   c. scytale

   d. Prussian

4. The telephone was invented by Alexander Graham Bell in _____.

   a. 1923

   b. 1861

   c. 1917

   d. 1876

5. Shortly after the end of World War I, a German engineer, Arthur Scherbius, developed the _____, a mechanical device that was capable of creating...