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Subject: Re: MATLAB code
Date: Mon, 9 Feb 2009 22:17:01 +0000 (UTC)
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Walter Roberson <roberson@hushmail.com> wrote in message <2TYjl.22066$Dx3.20719@newsfe21.iad>...
> chandu wrote:
> >          I am final year engg. student & doing my project on
> > steganography.I will be
> > thankful if you can send me the MATLAB code for LSB method of
> > STEGANOGRAPHY.
> 
> Did you think I was joking earlier when I made the reference to
> cryptography export laws and "munitions"? The relevant international
> treaty is named ITAR, which is the International Treaty on Arms Reduction.
> Cryptography is considered extremely important in warfare -- the Second World
> War is considered by many analysts to have been won primarily because the UK
> cracked the German "Enigma" encryption devices.
> 
> If you want the code, you will have to track it down yourself in a public
> publication, or from a country that is not a signatory to ITAR, such
> North Korea or Iran. For those of us in countries which have signed ITAR,
> sending you the code could be a one-way trip to prison.

  Chandu has asked a very naive question and clearly deserves some of the ribbing received above.  There is no such thing as a specific "code for LSB method of STEGANOGRAPHY".  That is a general category of subject matter and is like asking for the code for choosing the "best" stocks to purchase on the New York Stock Exchange (an admittedly very risky endeavor these days.)  There are a great many "codes" that undertake to utilize the LSB method in steganography.  A Google search will reveal many articles on the subject, as for example

 http://en.wikipedia.org/wiki/Steganography

  On the other hand, Walter, in my opinion it is being a bit paranoic to quote ITAR as a warning simply because Chandu is presumably a citizen of India (I quote you: "... and since India is not one of the countries ...".)  Granted that certain specific software that carries out particular steganography encodings might very well be classified, but I seriously doubt if such a thing is what Chandu has in mind.  The best thing to give as a response to this student with a prospective project in steganography would be a list of references to sources of general information on the subject and the admonition that we on CSSM aren't in the business of writing extensive software of any kind, whatever the subject matter.

Roger Stafford