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NCMF: 4.3.2b

CodeHS Lessons

In transposition ciphers the letters are not changed they are rearranged. The set of encryption functions E is simply the set of permutations of m, and the set of decryption functions D is the set of inverse permutations.

1.2 Encryption Algorithms
4.2 Encryption Algorithms
5.2 Encryption Algorithms