Cryptography: Transposition Cipher

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This lesson explains how to encrypt and decrypt a message using a transposition cipher.
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I'm paying my university to make me watch other peoples videos....

TheDiceRoller
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Great examples and explanation. Not very secure on it's own, but it looks like a powerful addition to add as an additional layer of encryption.

FusionDeveloper
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Hey, great stuff. What about when we know the number of columns but we dont know the order, (no key)

mariajs
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nice. now i understand how to decrypt.. hope you do more tutorial on crytography :)

susubiskut
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What if the characters were an odd number? This doesn't work because of the combinations

valkon_
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Sir can u say me whether its Permutation cipher?

mohammedmasoodalamr
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what if the key have repeated letters? (key=apple)

saikiranalagatham