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Reverse engineering

Obfuscation

Our discussion of obfuscation touched on the following URLs.

http://en.wikipedia.org/wiki/Obfuscation offers a definition of obfuscation as the obscuring of intended meaning.

http://www.ioccc.org/ The international obfuscated c code contest demonstrates that (sometimes) obfuscation may be used to optimize code, especially in the distant past.

http://www.bitdefender.com/ is an antivirus software believed not to suck, in contrast to macafee, which is what your employer puts on your computer because they gave a better presentation.

http://en.wikipedia.org/wiki/LOLCODE is a language you can use to amuse, as well as produce obfuscated code.

http://en.wikipedia.org/wiki/Base64 is used to embed advertisements in Wordpress templates among other things.

https://gist.github.com/nickmccurdy/4248498 \linebreak hosts Ugly.java, a helloworld program done in unicode escape sequences:

/*
 * Try compiling this. It actually works.
 * Output: "Hello world"
 */
 
\u0070\u0075\u0062\u006c\u0069\u0063\u0020\u0020\u0020\u0020
\u0063\u006c\u0061\u0073\u0073\u0020\u0055\u0067\u006c\u0079
\u007b\u0070\u0075\u0062\u006c\u0069\u0063\u0020\u0020\u0020
\u0020\u0020\u0020\u0020\u0073\u0074\u0061\u0074\u0069\u0063
\u0076\u006f\u0069\u0064\u0020\u006d\u0061\u0069\u006e\u0028
\u0053\u0074\u0072\u0069\u006e\u0067\u005b\u005d\u0020\u0020
\u0020\u0020\u0020\u0020\u0061\u0072\u0067\u0073\u0029\u007b
\u0053\u0079\u0073\u0074\u0065\u006d\u002e\u006f\u0075\u0074
\u002e\u0070\u0072\u0069\u006e\u0074\u006c\u006e\u0028\u0020
\u0022\u0048\u0065\u006c\u006c\u006f\u0020\u0077\u0022\u002b
\u0022\u006f\u0072\u006c\u0064\u0022\u0029\u003b\u007d\u007d

https://esolangs.org/wiki/Velato documents a programming language using MIDI files as source code. This page links to an mp3 of helloworld as an "easy-listening" jazz piano composition.

There are also “esoteric languages” which are deliberately obtuse, academic, or curiosities. The most famous one is Brainf**k https://en.wikipedia.org/wiki/Brainf**k that uses only the 8 characters “+ - < > . , [ ]". Similar to Velato is Piet (named after the artist Piet Mondrian), that uses images as code: http://www.dangermouse.net/esoteric/piet.html.