(Delphi ActiveX) ARC4 PRNG (Pseudo Random Number Generator)

Uses the ARC4 stream encryption algorithm as a pseudo random number generator.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
crypt: TChilkatCrypt2;
key: WideString;
data: WideString;
cipherHex: WideString;
i: Integer;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

crypt := TChilkatCrypt2.Create(Self);

// Set the encryption algorithm to ARC4:	
crypt.CryptAlgorithm := 'arc4';

// We want the encrypted output to be a hex-encoded string.
crypt.EncodingMode := 'hex';

key := '000102030405060708090A0B0C0D0E0F';
data := '12345678';

// Key length is 128 bits in this example.
crypt.KeyLength := 128;
crypt.SetEncodedKey(key,'hex');

// Generate 16 "random" 8-byte blocks, encoded as hex strings.
// This example will generate the identical output each time
// it is run.

for i := 0 to 15 do
  begin
    cipherHex := crypt.EncryptStringENC(data);
    Memo1.Lines.Add(data);
    Memo1.Lines.Add(cipherHex);
    data := cipherHex;
  end;
end;