hi! ok.. i went home last night.. had a really good think about how i could at least... DELAY these hackers.. :) (i dont ever expect to "stop" them).. i have written a prototype.. and it works! :P ... not so easy to crack.. these crackers now have to crack two pieces of code.. :) i use an RC4 based encryption algorithm.. decrypt my registration code generation code and then zap a function pointer to my "undecompilable" memory chunk.. and all my registration codes still work.. lovely. thats ONE step of the way.. does anyone have any code lying around that checks the "CRC" of the .prc file? i have made it harder for the crackers to get the regcode algorithm (which is what i was worried about first), now what i would like to have is some code that allows me to check if they screw with the opcodes directly (NOPing etc..).. anyone got it? before i spend hours doing it myself? az. -- Aaron Ardiri Lecturer http://www.hig.se/~ardiri/ University-College i G�vle mailto:[EMAIL PROTECTED] SE 801 76 G�vle SWEDEN Tel: +46 26 64 87 38 Fax: +46 26 64 87 88 Mob: +46 70 352 8192 A/H: +46 26 10 16 11
