This is not really a game, it's a challenge on cryptography. You need to decipher clues 1, 2, 3, and 4 and the discovery to find the answers to crypto checkpoints one, two, and three.

Main content

Computer science theory

Course: Computer science theory > Unit 2

Lesson 3: Cryptography challenge 101

Introduction

Google Classroom

HOW TO PLAY

This challenge is for all ages, it doesn't assume you have any specialized knowledge.

It builds off the ideas presented in the Ancient Cryptography tutorial

All other information you need can be found within Khan Academy.

Through this challenge there will be exercises to assess whether you broke the encryptions.

Q&A RULES

Please do not post successful decryptions in the Q&A (this is classified information!)

Please do post ideas/hints to help your fellow users (especially if you solved it)

Want to join the conversation?

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Ray Benton (the #1 Proponent Opponent Proponent)
Posted 6 years ago. Direct link to Ray Benton (the #1 Proponent Opponent Proponent)'s post “How many people have comp...”
How many people have completed the entire challenge?
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(16 votes)
Answer
BodhiG
Posted 7 years ago. Direct link to BodhiG's post “This whole article was ki...”
This whole article was kind of confusing.
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(8 votes)
Answer
Yugi aka kim.luke
Posted 9 years ago. Direct link to Yugi aka kim.luke's post “how do you play?”
how do you play?
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(4 votes)
Answer
- Enigma (Jacob)
  Posted 9 years ago. Direct link to Enigma (Jacob)'s post “This is not really a game...”
  This is not really a game, it's a challenge on cryptography. You need to decipher clues 1, 2, 3, and 4 and the discovery to find the answers to crypto checkpoints one, two, and three.
  Comment on Enigma (Jacob)'s post “This is not really a game...”
  (8 votes)
Mrs. Palmer
Posted 5 years ago. Direct link to Mrs. Palmer's post “This is probably the most...”
This is probably the most underrated content on Khan Academy... I completed it a couple years ago. It's challenging, but really fun! It's extremely satisfying if you're someone who likes to solve puzzles!
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(6 votes)
Answer
- Leaf Productions
  Posted 2 years ago. Direct link to Leaf Productions's post “Yeah, that is great but y...”
  Yeah, that is great but you should put your tips and thanks messages in the tips and thanks section.
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  (1 vote)
RED ENDER DRAGON
Posted 3 years ago. Direct link to RED ENDER DRAGON's post “can I use Cryptography in...”
can I use Cryptography in coding programs like c++ or python?
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(3 votes)
Answer
- pa_u_los
  Posted 3 years ago. Direct link to pa_u_los's post “The question is poorly wo...”
  The question is poorly worded. Yes, you can create encryption methods using many programming languages where c++ and python are included.
  Comment on pa_u_los's post “The question is poorly wo...”
  (1 vote)
Selena
Posted 3 years ago. Direct link to Selena's post “ok anything else we shoul...”
ok anything else we should know?
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(2 votes)
Answer
- jdu9
  Posted a year ago. Direct link to jdu9's post “No and have fun!”
  No and have fun!
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  (2 votes)
Mrudula
Posted 6 years ago. Direct link to Mrudula's post “What is the status on a n...”
What is the status on a new cryptography challenge?
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(1 vote)
Answer
Nightseeker1
Posted 7 years ago. Direct link to Nightseeker1's post “um... where's the crypto ...”
um... where's the crypto challenge, exactly?
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(1 vote)
Answer
- jdu9
  Posted a year ago. Direct link to jdu9's post “If you continue on there ...”
  If you continue on there is the crypto challenge in this activity.
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  (1 vote)
cyberninjaryu
Posted 7 years ago. Direct link to cyberninjaryu's post “how do you do the phi met...”
how do you do the phi method
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(1 vote)
Answer
- Pokemiles
  Posted 7 years ago. Direct link to Pokemiles's post “from what I understand th...”
  from what I understand the phi method is where you take any number an calculate the number of prime numbers leading up to it
  
  if the number is already a prime then simply subtract one :)
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  (1 vote)
cyberninjaryu
Posted 7 years ago. Direct link to cyberninjaryu's post “Where can I get more in ...”
Where can I get more in deep with this

And have some practice problem
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(1 vote)
Answer