Shift ciphers were used by Julius Caesar in Roman times. The key is a number which tells you how many letters you’ll shift the alphabet. These are fairly simple to encode and decode. However, you have to be extra careful when encoding because mistakes can throw off the decoding process. Watch the video to see why it’s important to double check your work!


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5 Responses to “Shift Cipher”

  1. Yes I think you’re right, I’ve edited the video and will get it replaced. Thanks for your eagle eye!

  2. ericksonnationmom says:

    your answer key to one is wrong
    abcdefghijklmnopqrstuvwxyz
    wxyzabcdefghijklmnopqrstuv
    this is what i encoded kqnoy dkkhs wopda xaopz this is what the answer key says kpnoy dkkhs woqda xaoqz at the end yours says q mine says p

  3. Whoops! You’re right… thanks for your eagle eye! I’ve updated the video now so it’s correct. 🙂 Great job – keep it up!

  4. Laura Kennedy says:

    My grand daughter caught your mistake. The only thing is, she saw the o was correct, and you just forgot to put the x for the b. She is loving these!

  5. Lillian Jackson says:

    This is so cool! I want to teach this to a few of my friends!