Code:
Public Function RC4(ByVal Data As String, ByVal Password As String) As String
On Error Resume Next
Dim F(0 To 255) As Integer, X, Y As Long, Key() As Byte
Key() = StrConv(Password, vbFromUnicode)
For X = 0 To 255
Y = (Y + F(X) + Key(X Mod Len(Password))) Mod 256
F(X) = X
Next X
Key() = StrConv(Data, vbFromUnicode)
For X = 0 To Len(Data)
Y = (Y + F(Y) + 1) Mod 256
Key(X) = xori(Key(X), F(Temp + F((Y + F(Y)) Mod 254)))
Next X
RC4 = StrConv(Key, vbUnicode)
End Function
Private Function nand(a, B)
nand = Not ((a And B))
End Function
Private Function xori(a, B)
xori = nand(nand(a, nand(a, B)), nand(b, nand(a, B)))
End Function
Use it to encrypt string in your code!
Make String Undetectable
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