unit Unit1;

interface

uses

  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,

  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;

type

  TForm1 = class(TForm)

    Edit1: TEdit;

    Edit2: TEdit;

    Button1: TButton;

    Button2: TButton;

    Edit3: TEdit;

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

  private

    { Private declarations }

  public

    { Public declarations }

  end;

var

  Form1: TForm1;

implementation

{$R *.dfm}

//首先定义一个常量数组

const

      XorKey:array[0..7] of Byte=($A1,$B7,$AC,$57,$1C,$63,$3B,$81); //字符串加密用

      //在程序里加入以下两个函数，

function Enc(Str:String):String;//字符加密函數 這是用的一個異或加密

var

i,j:Integer;

begin

Result:='';

j:=0;

for i:=1 to Length(Str) do

   begin

     Result:=Result+IntToHex(Byte(Str[i]) xor XorKey[j],2);

     j:=(j+1) mod 8;

   end;

end;

function Dec(Str:String):String;//字符解密函數

var

i,j:Integer;

begin

Result:='';

j:=0;

for i:=1 to Length(Str) div 2 do

   begin

     Result:=Result+Char(StrToInt('$'+Copy(Str,i*2-1,2)) xor XorKey[j]);

     j:=(j+1) mod 8;

   end;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

if edit1.Text<>'' then

begin

  Edit2.Text:= Enc(Edit1.text);

end;

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

  Edit3.Text:= Dec(Edit2.text);

end;

end.

https://blog.csdn.net/qq_33536143/article/details/85721391