Just had to have a look, love the following tidbit from FILE.C<p><pre><code> char cryptkey[]={'M'-4,'i'-8,'n'-12,'d'-16,'y'-20,0};
LONG Encrypt(char far *data,char *key)
{
LONG i=0,keypos=0;
while(data[i]!=0){
data[i++]^=key[keypos++];
if(key[keypos]==0) keypos=0;
}
return i;
}
</code></pre>
Coupled with the following quote from the preface of Bruce Schneier's Applied Cryptography<p>"The simple-XOR algorithm is really an embarrassment; it’s nothing more than a Vigenère polyalphabetic cipher. It’s here only because of its prevalence in commercial software packages, at least those in the MS-DOS and Macintosh worlds [1502,1387]."