Worst Abuse of the Rules: <nathan@inmos.co.uk> Nathan Sidwell	Nathan Sidwell	Inmos UK	1000 Aztec West	Almondsbury	Bristol	UK BS12 4SQJudges' comments:    The US International Traffic in Arms Regulations controls certain    exportations going out of the United States.  The U.S.  Munitions    List gives the specific categories of restricted exports.  Because    this entry appears to fall under this restricted catagory, the    judges may not be able to distribute winners outside of the USA.    Nathan Sidwell has stated that he is willing to distribute the    winning source.  To read HIS instructions of how to obtain his    winning program:	make nathan	nathan    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=    =-=-= The text below assumes that you have the winning source =-=-=    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=    To use:	make nathan    Try:	nathan obfuscate < nathan.c > foobarf.c	nathan - obfuscate < foobarf.c > barfoof.c	diff nathan.c barfoof.c    WARNING:	The judges' make no claim as to the strength or security	of this program.  It is likely to be nil, or the next	best thing to it.  Still, you might consider installing	it in /usr/games/nathan.  :-)    NOTE: 	The 'winning' catagory is also open to question.  One could say	that it is a 'file obfuscator'.  One could also say that it	unintentionally adbused the intent of rule #7 (that programs	should be freely redistributable).  We suspect that the author	may not have intended to do this, but that is the way things go	sometimes.	BTW, 'abuse of the rules' entries do not violate the rules.	Entries that violate the rules are disqualified.  Abuse of the	rules entries are ones that tend to 'streach' the limits and	take the contest into unexpected territory.Personal note from chongo:    I think this situation shows just how ridiculous US crypto    regulations really are.  Certain US federal officials can get away    with shipping arms to certain nations in apparent violation of US    laws, but I personally can't re-distribute a program contest winner    to the network!Selected notes from the author:    PROGRAM USE    This program is a hello world text encrypter/decrypter. It uses an    enigma (I think) style encryption algorithm, where the encryption    key character is modified by a value, determined from the previous    character.  Non-printable characters (those with ASCII values < ' '    or > 0x7e) are passed unaltered, thus any kind of file may be    successfully procesed, but if the original is printable, the    processed file will be too. The input is read from stdin, and the    output presented to stdout. The key, a text string, is presented as    a command argument. This is optional, and if ommitted, the file is    self-{de,en}crypted. To specify decryption, a "-" should be given    before the key. (Actually encryption and dycryption proper inverse    operations, so you can use decrypt to scramble and encrypt to    descramble, if you're perverse.)    PORTABILITY (A little knowledge is a dangerous thing)    Its written in ANSI C, and doesn't even assume an ASCII character    set, (it has an array of the characters to convert), so should be    portable across many platforms. It passes gcc -ansi -pedantic -O    -Wall with no warnings (You may get assignment in conditional    warnings on other platforms though).  Because I've heard that    conditional jumps slow down fast processors, I've eliminated all    the ifs from the code, indeed, as its only one statement, it should    compile to one instruction an a suitably designed CISC machine. To    speed compilation, there is only one statement in the loop, so that    another scoping level does not need to be opened.    Being an encrypter/decrypter, you probably want the source code to    be obfuscated, to hide the algorithm.    OBFUSCATION    Inspite of the fact that it looks like a nice friendly hello world    program, it isn't (as documented above). (Short lines have been padded,    as you'll find if you look at an encrypted copy of the source.)    I've also named some of the macros from commonly used functions,    just to keep things muddy. Of course, all the variables are    misnamed. The program is kept simply (one for statement), by    serious overuse of , and ? :. These are really confusing when used    together, nested or put in argument lists (is that a comma    operator, or argument separator?)