Encrypting

[TokenHerbz]

How would you go about encrypting a save file for your pogram...

Say you got a user name and password, or RPG info, and save it to a file called... Save.txt

what do you do to get both numbers and letters jumbuled so the user can't read it... Also, to unencript it so it is readable....


Also, say you have 2 turing files.. a Main.t and a Data.t

in the main.t file you include data.t which holds say, var t: string := "Talk"

main file says, put t (this is just for an example)

You turn Main.t into .exe so how do you stop users from accessing data.t

[Martin]

Well, the easiest you could do would be to just add n to each letter.

a -> c
b -> d
c -> e
...
etc.

Or maybe, add 2 * the index in the string.
For the password 'abcd', you would get
a -> c (a + 2*1)
b -> f (b + 2*2)
c -> i (c + 2*3)
d -> l (d + 2*4)

Basically, you can use any obfuscation that is reversible.

Or if you want, you could look into using seeded random numbers - this way you just add a random amount to each letter, but you can figure out what those random amounts were later.

The pros use http://en.wikipedia.org/wiki/RSA , but that could be overkill

[md]

don't forget xor encryption; or base64 encoding. Both are simple and useful for obfuscation. Really unless your using something more complex then substitution and different bases all your doing is obsucation rather then encrypting.

If you're really adventurous though you could try your hand at porting Blowfish to turing

[TokenHerbz]

Lamer... your suggetion
a -> c (a + 2*1)
b -> f (b + 2*2)
c -> i (c + 2*3)
d -> l (d + 2*4)

what happends in the word iglooze, where z is the last letter, and cannot grow? Im thinking it will be alot of code to get the z to subtarct yes?

Im looking for an effective, easy, and fast way to encripy both numbers and letters...

[Andy]

err of course z works.. z + 2*26 == z

[MysticVegeta]

Cornflake wrote:

don't forget xor encryption; or base64 encoding. Both are simple and useful for obfuscation.

eh, I doubt the information hes storing inside the file will be "that" important/confidential. lol.

[Delos]

TokenHerbz wrote:

Lamer... your suggetion...

Actually, his name is Martin. His title is Lamer. Look again...

[TokenHerbz]

lol oh yeah, lamer just stood out and stuck in my head....

Um, I will attempt to try the encryption...

[[Gandalf]]

TokenHerbz, there are characters with ASCII values higher than z. After that, it would be: ... x, y, z, {, |, } ...

[TokenHerbz]

Ok here is my test code which seems to work, any ideas to improve will help alot, but im thinking of puting the encryption into a proceadure and call it with EACH variable, cause i dont know how else to make this effective for 50 variables.... Any ideas?

code:

%%encrypting test setscreen ("Graphics:200;200") var test_File : int var word : string := "thiss" var newword : string := "" var num : int := 23 var newnum: string var letter : string proc save     %%code strings     for i : 1 .. length (word)         newword += chr (ord (word (i)) + 5)     end for     put newword     %%code numbers     newnum := chr (num)     put newnum     %%save it into file     open : test_File, "Test1.txt", put     put : test_File, newword, " ", newnum     close : test_File end save save proc load     %%gets the strings from file     open : test_File, "Test1.txt", get     get : test_File, newword, newnum     close : test_File     %%uncodes strings     word := ""     for i: 1 .. length(newword)         word += chr (ord (newword (i)) - 5)     end for     %%uncodes the numbers     num := ord (newnum) end load load put num put word

%%look in the file... to see it work...

[TokenHerbz]

Alright, lets say i have a basic encryption...


I wish to make a brief case to which i can *hide* files in, where you need a password to access it... lets say i want to put some good old .exe's and movies of sorts, perhaps pics too...

Is turing able to act like a folder?? with a password ability?? I would like some help on this, as i have not learned anything on this yet...

[TokenHerbz]

Edit:: i cant find the edit button

I forgot to mention...

if it can hold and secure files, can it block searches aswell, saying acees is needed, or better yet, not being able to detect it on the comp?

[[Gandalf]]

The edit button was removed some time ago.

Basically, the answer to all those questions is no. You would probably need access to the Windows API for all those things, which Turing doesn't have. The only thing you can do is encrypt/obfusciate the files in those folders.

[TokenHerbz]

Can anyone help me creat an effective encrytion code?

I want to lots of info into here, threw serveral variables of all types...

Booleans / Ints / strings :etc:

and i cant encrypt each variable at a time...

[codemage]

I'm surprised that nobody has mentioned changing the file postfix.

If your data file is named *.txt, you're just begging someone to start editing values & seeing what happens.

If you rename it to a non-editable type (it's ok to lie with filenames) like .dll or .ifo or .sys, you'll scare off 90% of would-be hackers.