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1996-08-11
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Perfect Crypter 1.0 (c) 1996 Perfect Productions // Abe
Documentation
.- FEW WORDS ABOUT PERFECT CRYPTER -.
As you probably have noticed, PC is a program to crypt files. A good one.
With PC, you can crypt any sort of files: exutables, textfiles, pictures,
anything. I do not claim it's 100% secure, nothing is, but I would say it's
99.9% secure. Every time you use PC to crypt something, PC uses a unique method
for crypting the file, every time. The only shitty thing here is, that PC is
slow, I mean really slow (about 12 kilobytes in sec with my 100Mhz pentium),
and I'm trying to speed this shit up for further versions. Well,the speed ain't
so important if you use PC to crypt documents or something like that, but if
you use it to crypt packed packets (zip's, arj's...) it's feels too fucking
slow (it takes about 2 minutes to crypt 1.44Mb zip with my computer),but that's
the price you pay for security. And it's even a little bit slower to decrypt.
Anyhow, if you need security for your files, PC gives you everything you need.
Just remember that if you crypt a file, delete the original file and forget the
password, kiss your file goodbye. There is no way to decrypt the file if you
forget the password.
.- INSTALLING PERFECT CRYPTER -.
Unlike Perfect Password,PC doesn't need any special things to work,just run it.
.- USING PERFECT CRYPTER -.
As said before, with PC you can crypt any sort of files. Maybe the best way to
crypt your files is first pack all the files you want to crypt (with pkzip or
arj or something), and then use PC to crypt the packet with a password. Well
now you are maybe thinking that "hey, there's a password option in pkzip, I'll
just use it and it's all done". Well, I wouldn't bet too much for that, cause
every fucking BBS has at least one program to hack password protected zip file,
so it ain't too hard to hack a zip file. Anyway, packing your files before
crypting will save some space. How PC is used? Well just type
PCRYPT <file.ext> <file.pcf>
in dos prompt and there it is. After this PC will ask you for the password, so
just enter the password, and after that PC will ask for the password again,
just to make sure that you didn't screw up with the password. If these two
passwords won't match, PC will give you an error message. Anyhow, here's couple
of examples for using PC:
PCRYPT COMMAND.COM COMMAND.PCF
or
PCRYPT PSECUR10.ZIP PSECUR10.PCF
it's that easy. It is recommeded that you use PCF (Perfect Crypted File) as the
file extension, so it is easier to identify the PCF's. There are no swithes in
PC, coz there are no options. "Well how will I uncrypt these files?" -It's even
more simple, just type
PUNCRYPT <file.ext>
examples:
PUNCRYPT COMMAND.PCF
or
PUNCRYPT PSECUR10.PCF
it's that simple. Now PUC will ask for the password. Just input the right
password, if the password ain't right, file will not be uncrypted.
.- BUGS -.
There are no known bugs in PC. Anyway, if you find one, please report it to
me so I can fix it to further versions. You can email us at:
an695897@anon.penet.fi
and describe the bug. Remember to write down all possible error messages, when
and how the bug appears, and all that sort of stuff. Well there should't be
any bugs, we have tested this so much, but hey, you never know. And remember,
there is absolutely no way that PC would somehow fuck up your original files,
coz it uses the source files as read-only files.
.- COMMENTS -.
If you want to give us some comments, critic, or just want to lick our asses,
feel free to send email us to an695897@anon.penet.fi
.- DETAILS ABOUT PERFECT CRYPTER -.
Here I'm talking more about PC's crypting method, and that kinda stuff. So
if you ain't interested about these things, you can skip this "chapter". First
of all, I would like to say that PC ain't a password-based crypting program.
This means that the password ain't any keyword or something like that. Well
okay, the few first characters of the password have some meaning,but that ain't
important. Anyway, the crypting method is very complex, and thats why PC is so
slow. I could tell you the method(s) PC uses, and it still would be almost
impossible to crack PCF's. The reason why I won't tell it,is that I have worked
real hard to create it, and I don't want any Joe Therandomcoder to code his own
crypting program with my ideas. The reason why PC doesn't use a keyword based
crypting method, is that it's too easy to make a cracker for those cryptings.
As you may have noticed, PC's crypting is based on changing every
character's ascii value to something else. But the way that how the new value is
chosen is the main thing. And at here PC makes very complex calculations. Let's
take a example. Imagine that you have file called test.txt, and it contains ten
characters. Now every one of these characters has an ascii value 97 ('a'). So
you have string like "aaaaaaaaaa". Now you crypt this file to test.pcf. Okay,
view that file and now you may have string "".Or you can as well have
string like "åååååååååå". Or anything - thats the basic idea. Well, if you view
any PCF, first there's the header of the file. Here is everything that PC
needs to decrypt the file. The header contains for example the password for this file in
crypted form and much more data needed to decrypt the file. If this header
corrupts, the file can't be decrypted. The header is 303-558 bytes big,the size
depends about the length of password, so if you use a password that is 4
characters long, the size of header will be 303 bytes, and if you use a password
that is 255 characters long (max lenght), the size will be 558 bytes. After the
header comes the actual data for the file. Okay, here's about everything I can tell
about the crypting method without revealing any major ideas.
.- THANKS -.
Thanks goes to:
Daemon - for Perfect ansi,
Mice - for Perfect ascii.
-Abe / PEP '96