100-year-old Double Transposition Cipher Cracked(webcache.googleusercontent.com)
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100-year-old Double Transposition Cipher Cracked
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In case, like me, you didn't understand the algorithm description n the text: http://en.wikipedia.org/wiki/Double_transposition_cipher
Also an example of single transposition:
http://crypto.interactive-maths.com/columnar-transposition-c...