Cryptology Exam: 20 points
Name:
Period:
Date:
Directions:
Use a separate piece of paper to decode the encrypted messages below.
1. Digit Blocks
CA NY OU FI GU RE OU TW HA TH IS CO DE IS TR YI NG TO SA Y? WR IT ED OW NW HA TH PA
TT ER NI ST GE TC RE DI T.
Answer:
Can you figure out what this code is trying to say? Write down what h pattern is to get credit.
2. Order
SIHT SI A DRAH EDOC OT ETAERC MORF HCTARCS.
Answer:
This is a hard code to create from scratch.
3. Create a placement value table for Base 2 and Base 5 number systems.
Encode the Base 10 number 62 in both base systems.
Answer:
Base 2: 64 32 16 8 4 2 1
1 1 1 1 1 0
Base 5: 125 25 5 1
2 2 2
4. ASCII Code
72-97-118-101-32-121-111-117-32-119-114-105-116-116-101-110-32-116-111-32-116-104-101-32-74-97-112-97-110-101-115-101-32-115-116-117-100-101-110-116-115-63-32-32-84-104-101-121-32-97-114-101-32-119-111-110-100-101-114-105-110-103-32-119-104-97-116-32-66-105-103-102-111-111-116-32-105-115-32-97-110-100-32-105-102-32-104-101-32-114-101-97-108-108-121-32-108-105-118-101-115-33
Answer:
Have you written to the Japanese students? They are wondering what Bigfoot is and
if he really lives!
5. Letter substitution and ASCII values.
Uijt!jt!b!tjnmf!bmqibcfu!tvctujuvujpo/!!Ju!jt!pggtfu!cz!pof!tp!uibu!uif!mfuufs!#b#!bduvbmmz!frvbmt!uif!mfuufs!#c/#!!Cvu-!ju!tujmm!dpssftqpoet!up!uif!BTDJJ!dpef!wbmvft!gps!fbdi!dibsbdufs/
Answer:
This is a simle alphabet substitution. It is offset by one so that the letter "a"
actually equals the letter "b." But, it still corresponds to the ASCII code values
for each character.
6. Create a spiral for letters A-Z and common punctuation.
Answer:
Most students will give A a value of 1, Z a value of 26. As the spiral develops,
A would be equal to 27 if no punctuation marks are included.
7. Create a spiral with random number assignment for letters A-Z and
common punctuation.
Answer:
Same as question 6, except that each letter is randomly assigned for the first spiral.
The additional spiral values are created by adding on to the original value plus
the number of characters in the spiral. Example: If A is a value of 15 and there
are 30 characters in the sprial, the second spiral value for A is 15 +30 = 45.
8. Create a map code with a matrix letter assignment.
Answer:
Any matrix similar to cartesian coordinates, corresponding to A-Z symbol patterns
on the map.
9. Explain how a code wheel is created and used to encode and decode code systems.
Answer:
Create two paper wheels, one larger than the other. Put the code on one wheel, the
actual letter values on the other. Put a pin in the center and start crypting.
10. Morse Code or Symbols Font.
Put the message "This is morse code" down in symbols and morse code fonts for students to decipher.
Answer:
This is morse code
Extra Credit: Define cryptology and give one or more examples.
Answer:
Cryptology is the study of secret codes or crypts. Invisible ink, ascii code, and
backwards lettering are just a few examples.