void Hexadecimal_Message ( unsigned char *String )
{
        int i, N;

        i = 0;
        while ( i < 64 )
        {
                N = Message[i] * 8;
                N += Message[i + 1] * 4;
                N += Message[i + 2] * 2;
                N += Message[i + 3] * 1;
                switch ( N )
                {
                case 0:
                        *String = '0';
                        break;
                case 1:
                        *String = '1';
                        break;
                case 2:
                        *String = '2';
                        break;
                case 3:
                        *String = '3';
                        break;
                case 4:
                        *String = '4';
                        break;
                case 5:
                        *String = '5';
                        break;
                case 6:
                        *String = '6';
                        break;
                case 7:
                        *String = '7';
                        break;
                case 8:
                        *String = '8';
                        break;
                case 9:
                        *String = '9';
                        break;
                case 10:
                        *String = 'A';
                        break;
                case 11:
                        *String = 'B';
                        break;
                case 12:
                        *String = 'C';
                        break;
                case 13:
                        *String = 'D';
                        break;
                case 14:
                        *String = 'E';
                        break;
                case 15:
                        *String = 'F';
                        break;
                }
                String++;
                i += 4;
        }
}