Password For Zip files

[AssiDragon]

Weeeell there is a way afterall

Create your own 3D, sound, music and bitmap format which only your program uses, so whatever they do they can't ripp it out simply LOL

[keless]

Just to let you know, if the guy is smart enough to change file extension and unzip, he is probably smart enough to get a Zip password cracker. But again, who know

even easier than that.. most likely you were planning on saving the password as a string of text in your code, perhaps as a define, or in a function.. ie: #define ZIP_PASS "yourmamma"

All anyone has to do is open up your .exe file and look thru it with a common text editor. Because it was an ASCII string, it will be stored the same way within your EXE binary. Sure, they wont see that its been defined as ZIP_PASS, so they'd have to put two and two together.. but if they already recognize that the ZIP is pwd protected, they will.

Instead you'd either have to split up the password, and assemble it when the time comes.. or better yet, find the ASCII value for each letter and bit shift it to the right by 5, then define ZIP_PASS as that _number_.

#define ZIP_PASS 2349128 >> 5; //some number that equals your string, bit shifted to the right

when that time comes, simply shift the number left again and run it thru sprintf() to get the text value.

sprintf(pass, "%s", (char*)( ZIP_PASS << 5 ) );

that example code wont compile, but you get the idea.

[keless]

Once, I had the same problem. The way i solved it:
After making the zip-file I xored it by any byte. When the programs starts, it xores the file again by the same byte and safes the result in the temp-dir. This file can now be handled as a zip-file. On terminating the program it deletes the tmp-file.

This is an easy to implement and quick solution. I just want to point out that a decent hacker/cracker worth his salt will notice such a file easily. Then they have a the full file.