program Encryption;

uses

  SysUtils, Graphics, Classes, HPDFDoc;

var

  HPDF: THotPDF;

begin

HPDF:= THotPDF.Create(nil);

try

     HPDF.FileName := 'Encrypt.pdf';              

     HPDF.ActivateProtection := true;                                        // Enable encryption

     HPDF.CryptKeyLength := k128;                                           // Set encryption type to 128 bit

     HPDF.OwnerPassword := 'OwnerPass';                                // Установить пароль владельца

     HPDF.UserPassword := 'UserPass';                                     // Установить пароль пользователя

     HPDF.ProtectOptions := [prPrint, prExtractContent];             // Allow user to extract PDF content

     HPDF.BeginDoc;                                                               // Создать PDF-файл

     HPDF.CurrentPage.TextOut(10, 10, 0, 'Encrypted document !!!'); // Print text

     HPDF.EndDoc;                                                                  // Закрыть PDF-файл

finally

       HPDF.Free;

end;

end.