ok today im going to show you how to make a dynamic crypto
a dynamic crypto in a nutshell
if my message is: hi how are you?
i have 2xh and 2xo
my encrypted text: ij,jpx.bsf:zqv!
its with the cizer cipher just dynamic
if i just decoded it id get hi iow are ypu?
its simple but were gonna make it a bit better
were gonna add 1 to the offset for each next letter
we will just be using
using System;//just for a the exeptions
now we will make to encryption class
we will set up the offsets and the alphabet
private int e_offset = 1;
private int d_offset = 1;
public Char[] alphabet = new Char[]
{ 'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', 'o', 'p', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'y', 'x', 'c', 'v', 'b',
'n', 'm', 'Q', 'W', 'E', 'R', 'T', 'Z', 'U', 'I', 'O', 'P', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'Y', 'X', 'C',
'V', 'B', 'N', 'M', ' '}/;/german qwertz keyboard
for the encryption we will turn the string into a char array
then we will find where the char is in our alphabet and add the offset
and add the result to a string and repeat for the rest
iv made it easier for you to add your own alphabet
public string encrypt(string text)
{
string end = "";
char[] char_text = text.ToCharArray();
for (int y = 0; y < text.Length; y++)
{
int num_of_char = 0;
for (int x = 0; x < alphabet.Length; x++)
{
if (char_text[y] == alphabet[x])
{
num_of_char = x + e_offset;
e_offset++;
break;
}
else if (x == alphabet.Length)
{
throw new Exception("un-supported character");
}
}
if (num_of_char > alphabet.Length)
{
int temp = num_of_char % alphabet.Length;
num_of_char = 0;
for (int x = 0; x < alphabet.Length; x++)
{
if (temp != 0)
{
num_of_char++;
temp++;
}
else
{
break;
}
}
}
end += alphabet[num_of_char].ToString();
}
return end;
}
for the decryption it gets a bit harder we have to do the same thing just in revers so instead of + its -
and if we go under the 0 it we have carry on from alphabet.Length
public string decrypt(string text)
{
string end = "";
char[] char_text = text.ToCharArray();//turns string to char
for (int y = 0; y < text.Length; y++)
{
int num_of_char = 0;
for (int x = 0; x < alphabet.Length; x++)
{
if (char_text[y] == alphabet[x])//gets to location of the same char
{
num_of_char = x;
break;
}
else if (x == alphabet.Length)
{
throw new Exception("un-supported character");
}
}
int res = 0;// % will allwas return as a int less than 0
int temp = num_of_char - d_offset % alphabet.Length;//so we dont go over
for (int x = 0; x < alphabet.Length; x++ )//so we dont go under
{
if (temp >= 0)
{
temp++;
res++;//flips int e.g: -9 will turn into 9
}
else
{
break;
}
}
end += alphabet[res].ToString();//gets the char pos and gose back as far as the off set is
d_offset++;
}
return end;
}
}
i encrypted (hhhhh) and got (jklyx)
thats all to it have fun
-dedady-
