The School Code Breaking Site

Code Breaking Puzzles to Solve for KS3 and GCSE Students

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    • FOBISIA 2023 LEVEL 1B: Murder Mystery CODE 1
    • FOBISIA 2023: LEVEL 2 CODE 1
    • FOBISIA 2023 LEVEL 3 CODE 1
    • FOBISIA 2023 LEVEL 4: Test of Genius
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    • FOBISIA 2022 LEVEL 1: Code 1
    • FOBISIA 2022 LEVEL 2: Code 1
    • FOBISIA 2022 LEVEL 3: Code 1
    • FOBISIA 2022 LEVEL 4: Code 1
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FOBISIA CODE CHALLENGE 2023 LEVEL 1: Intro

Featuredby Ibmathsresources.com

FOBISIA CODE CHALLENGE 2023 LEVEL 1 2023: Intro In this level there are 6 codes to crack.  Break them all and you can submit your details to record your achievement.  […]

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FOBISIA CODE CHALLENGE 2023 LEVEL 2: Intro

Featuredby Ibmathsresources.com

FOBISIA CODE CHALLENGE 2023 LEVEL 2: Intro These codes are a little harder than in Level 1.  Break them all and you can submit your details to record your achievement.  […]

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FOBISIA CODE CHALLENGE 2023 LEVEL 3: INTRO

Featuredby Ibmathsresources.com

FOBISIA CODE CHALLENGE 2023 LEVEL 3: Intro In this level you have to crack a spy mystery.  Can you do it?   Good luck! Important instructions Solve the code below and […]

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FOBISIA CODE CHALLENGE 2023 LEVEL 4: Intro

Featuredby Ibmathsresources.com

FOBISIA CODE CHALLENGE 2023 LEVEL 4: Intro In this level you tackle a fiendishly hard set of puzzles – not for the faint hearted! Important instructions Solve the code below […]

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Beale’s Papers and a $65 million uncracked code?

May 30, 2022by Ibmathsresources.com

Crack the Beale Papers and find a $65 Million buried treasure? The story of a priceless buried treasure of gold, silver and jewels (worth around $65 million in today’s money) […]

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One Time Pad – The Uncrackable Code?

June 22, 2015by Ibmathsresources.com

The one time pad is a very secure way of encoding messages – so secure in fact that it is unbreakable as long as the agents using it don’t make […]

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Cracking Codes Lesson

June 18, 2015by Ibmathsresources.com

Cracking Codes Lesson 1 Introduction: 5 minutes – Use a Morse Code Generator to play some (very slowed down) messages for students to decode.  Discuss why this is was a good […]

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Crypto Analysis to Crack Vigenere Ciphers

June 18, 2015by Ibmathsresources.com

Crypto Analysis to Crack Vigenere Ciphers (This post assumes some familiarity with both Vigenere and Ceasar Shift Ciphers.  You can do some background reading on them here first). We can […]

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Using Chi Squared to Crack Codes

June 18, 2015by Ibmathsresources.com

This is inspired from the great site,  Practical Cryptography which is a really good resource for code making and code breaking.  One of their articles is about how we can […]

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Chi squared

Elliptical Curve Cryptography

June 18, 2015by Ibmathsresources.com

Elliptical Curve Cryptography This post builds on some of the ideas in the previous post on elliptical curves.  The excellent Numberphile video above expands on some of the ideas below. […]

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Introduction

This is the School Code Breaking website, part of the intermathematics.com sites for international schools.

Maths and code breaking have a long and shared history. The skills that make good mathematicians, problem solving, logical thought and perseverance are the same skills that make great code breakers.

Governments and companies that deal in digital data are always on the look out for talented mathematicians – so who knows, maybe one day you could be a professional code maker or code breaker.

Hope you enjoy the challenge!

Andrew Chambers

  • 2,270,498 views

The Fobisia maths code breaking challenge will run from September 18th until September 22nd 2023. Good luck to all participants!

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