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A tool that implements Johannes Trithemius’ simple polyalphabetic cipher
Java
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README.markdown
Trithemius.java

README.markdown

Trithemius

Trithemius is a Java command line tool that implements Johannes Trithemius' simple polyalphabetic cipher. It can encipher and decipher input from the standard in or a file, and release the output to the standard out or a file.

Known bugs

  • If you choose the same file as input and output, the file will simply end up empty, and there's no warning that this will happen
  • Both input and output files must be readable and writable---but the input file should only have to be readable and the output writable
  • I don't have access to Trithemius' original Polygraphiae text, so I'm not sure if enciphering and deciphering are shifting in the right directions
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