CS Codes Answers

Coding

Modified: 2022-01-04

Watch the NOVA show on coding and answer the following questions while you watch.

What is a substitution cypher?

ABCDEFGHIJKL...
CDEFGHIJKLMN...

In other words: A = C, B = D, C = E...Y = A, Z = B (for a cypher that moves right two letters)

FYI: one of the questions on Test 2 will be encyphered in a similar, simple manner.

ETAOIN SHRDLU is the order of letter frequency in English. Remember this acronym when you are invited to compete on Wheel of Fortune TV show

What was installed on top of the Admiralty Building in London?

Antennas! Radio waves, wireless communication

What telegram was leaked to the USA by the British?

Leaked Zimmerman Telegram (Mexico to go to war with USA and gain territory)

The coding machine the Germans used in WWII was called?

Enigma

The code name for the Japanese diplomatic code was?

JN-25

How did the US Navy code breakers infer that Midway Island was the target?

They sent a low-level code that said "AF" was out of fresh water.

The U-Boat code eventually used how many Enigma rotors?

Four

At the National Cash Register Company women worked doing what?

Making rotors for the "Bombe" an early computer.

Alan Turing and the British code breakers worked at an estate called?

How many pieces of the Japanese Naval Code machine remain?

One