基于PC的虚拟仪器软件加密方法的研究

为了保护基于PC的虚拟仪器软件不被侵权，针对基于PC机的虚拟仪器软件易于被复制的问题，分析了几种软硬件加密方法的特点和效果，提出了一种新的基于PC的虚拟仪器软件加密方法。采用通过读取数据采集卡序列号和加密算法相结合的方法产生注册码，并写入WINDOWS操作系统注册表的方式来防止软件产品的非法拷贝。该加密方法把虚拟仪器的硬件和软件有效地结合起来，增加了破解的难度。通过在多个振动测量系统上的应用，证明了该软件加密方法的有效性。这种软件加密方法的特点是实现简单、隐蔽性好、成本低。

A method for encrypting the virtual instrument software based on PC

The software in virtual instrument based on personal computer （PC） can be easily copied. The charac-teristics and effects of several hardware and software encryption methods are analyzed in this paper to protect the property of software not to be infringed. This paper also describes a new method to encrypt the virtual instrument software with the serial number of the DAQ （data acquisition card）. Using the registration code which is generated by getting and encrypting the DAQ＇s serial number and saving it in the windows operation system, the virtual instrument software can be protected from being copied illegally. This method has been proved to be effective by its application in multiple vibration measurement systems. This method has many advantages such as simple implementation, good concealing and low cost.