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Shoehorning Codes and Ciphers

Shoehorning Codes and Ciphers. Utilising the massive learning and excitement potential of . i nto your lessons. Today you will…. See how codebreaking can be used to inject intrigue and relevance into activities Suddenly have some GREAT ideas that you can share with everyone Especially me.

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Shoehorning Codes and Ciphers

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  1. ShoehorningCodes and Ciphers Utilising the massive learning and excitement potential of into your lessons

  2. Today you will… • See how codebreaking can be used to inject intrigue and relevance into activities • Suddenly have some GREAT ideas that you can share with everyone • Especially me

  3. Crack it!

  4. LitracySkilz • What clues are you looking for? • Double letters? • Short words? • Sentence structure? • Ideas: • Variations on Hangman for key words/ phrases • Include punctuation

  5. Context • Bletchley Park’s codebreakers used these clues to help crack German ciphers during WWII • MFL?

  6. Mathematics • MASSIVELY mathematical: • Binary addition / subtraction • Probability… • … more probability • Modular arithmetic • Prime numbers, factors & multiples • Solving & rearranging equations • Frequency

  7. Frequency Analysis IH SER MOIHG YNHGR LG HBG SEAG HBEH G IA HBG KYAH SYKKYR DGHHGT IR E HGJH, NYDDYCGZ LQ H, E ERZ Y. HBIA SER BGDF CBGR QYO'TG HTQIRU HY ZGSYZG KGAAEUGA! EETZVETW. Ciphertext Letter Frequencies English Language Letter Frequencies IH SER MOIHeYNHeR Le HBeSEAe HBEH e IA HBe KYAH SYKKYR DeHHeT IR E HeJH, NYDDYCeZ LQ H, E ERZ Y. HBIA SER BeDFCBeRQYO'Te HTQIRU HY ZeSYZeKeAAEUeA! EETZVETW. It SER MOIteYNteR Le tBeSEAetBEt e IA tBeKYAt SYKKYR DetteT IR E teJt, NYDDYCeZ LQ t, E ERZ Y. tBIA SER BeDFCBeRQYO'TetTQIRUtYZeSYZeKeAAEUeA! EETZVETW. It SaRMOIteYNteR Le tBeSaAetBat e IA tBeKYAt SYKKYR DetteT IR a teJt, NYDDYCeZ LQ t, a aRZ Y. tBIASaRBeDFCBeRQYO'TetTQIRUtYZeSYZeKeAAaUeA! aaTZVaTW. It SaRMOIteoNteR Le tBeSaAetBat e IA tBeKoAtSoKKoRDetteT IR a teJt, NoDDoCeZ LQ t, a aRZ o. tBIASaRBeDFCBeRQoO'TetTQIRU to ZeSoZeKeAAaUeA! aaTZVaTW. it can quite often be the case that e is the most common letter in a text, followed by t, a and o. this can help when you're trying to decode messages! aardvark.

  8. Frequency Analysis • How quickly can you find out what is unusual about this paragraph? It looks so ordinary that you would think that nothing was wrong with it at all, and in fact, nothing is. But it is unusual. Why? If you study it and think about it you may find out, but I am not going to assist you in any way. You must do it without coaching. No doubt if you work at it for long, it will dawn on you. I don't know. Now, go to work and try your luck.

  9. If you have a go at codebreaking in your lessons… tell me about it I want to work with educators and learners to produce, share and distribute resources.

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