[ELPA] New package: vigenere

[ELPA] New package: vigenere

[Ian Dunn]

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I'd like to submit vigenere.el to ELPA.  It's a single-file package to run a vigenere cipher[1] on a block of text.

If no one's got any objections, I'll add the package and copyright headers and push it to the git repo.

[1]https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher


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-- 
Ian Dunn

Re: [ELPA] New package: vigenere

[Richard Stallman]

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

Please add text to the doc string saying,

This is for historical interest, not a serious system for encryption.

You might think everyone knows that, but most people are not curious
about ciphers.

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.

Re: [ELPA] New package: vigenere

[Ian Dunn]

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    RMS> Please add text to the doc string saying,

    RMS> This is for historical interest, not a serious system for encryption.

    RMS> You might think everyone knows that, but most people are not curious
    RMS> about ciphers.

Done.  I often find packages through their functions, so I added a note about it to the function doc strings and the package commentary, for good measure.


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-- 
Ian Dunn

Re: [ELPA] New package: vigenere

[Richard Stallman]

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  >     RMS> This is for historical interest, not a serious system for encryption.

  >     RMS> You might think everyone knows that, but most people are not curious
  >     RMS> about ciphers.

  > Done.  I often find packages through their functions, so I added a note about it to the function doc strings and the package commentary, for good measure.

Thanks for doing this thoroughly.

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.

Re: [ELPA] New package: vigenere

[Uwe Brauer]

>>> "Ian" == Ian Dunn <dunni@gnu.org> writes:

   RMS> Please add text to the doc string saying,

   RMS> This is for historical interest, not a serious system for encryption.

   RMS> You might think everyone knows that, but most people are not curious
   RMS> about ciphers.

   > Done. I often find packages through their functions, so I added a note
   > about it to the function doc strings and the package commentary, for
   > good measure.

If I am not mistaken a Vigenere cipher is secure, if

    -  the key is as long as the message

    -  the key will only be used once

    -  the key is a random sequence

I am not entirely sure, but maybe this was the first implementation of a
one time pad.

BTW I think historically the autokey cipher, (the secret text is
added to the secret key) was also introduced by Vigenere. Maybe you
could add feature for historical reasons?

Uwe Brauer