Division: Div C – High School
NC Essential Standards Alignment: None
Event Rules: See the National rule manual
Event Score Sheet: None
National Event Page: Here
Required Materials: Teams must bring writing utensils with an eraser and may bring up to three (3) stand-alone non-graphing, non-programmable, non-scientific 4-function or 5-function calculators.
Teams will decode encrypted messages using cryptanalysis techniques, or show skill with advanced ciphers by encrypting or decrypting a message.
Teams must bring writing utensils with an eraser and may bring up to three (3) stand-alone non-graphing, non-programmable, non-scientific 4-function or 5-function calculators. No resource materials, except those provided by the event supervisor, may be used. The event supervisor will provide scratch paper for each team to use.
High score wins.
This event allows up to 3 team members. Teams are allowed to divide and conquer the test.
Online Interactive tests instructional video
Codebusters 2019 Coaches Clinic Presentation (2018 Rules)
Codebusters Coaches Institute Notes
2018 Codebusters Regional Test 1
2018 Codebusters Regional Test 2
2018 Codebusters State Test
Codebusters Test Tools
The State event supervisor for Codebusters has set up a twitter handle to send out tips and tricks. @NCSO_cb
Important update from the Coaches institute. The K2 alphabet hint is actually a K1 alphabet hint. Everything described works the same, just the label is a K1 instead of K2. You can read on how to solve with a K1 alphabet at http://toebes.com/Ciphers/Solving%20a%20K1%20Alphabet.htm.
Previous tests can be found at http://toebes.com/Ciphers/index.html
CIA – break the code
The Imitation Game
Make your own codes:
Encode/Decode Tool: http://www.dcode.fr/hill-cipher