使用VB.NET编程语言在Visual Basic.NET 2003的平台下自己动手设计开发一款文件加密软件，采用DES加密算法，能实现对各种类型的文件进行加密和解密是关键之处，主要要把这个做完善。-use VB.NET programming language in Visual Basic.NET 2003 platform personally developed an encryption software documentation using DES encryption algor

matlab下的绘制等温线的源程序，有对等温线加密，值得借鉴-Under matlab draw isotherm source, there is encryption on isotherm, is worth learning

用Arnold变换实现lena灰度图像的加密，然后用反变换对加密后的图像进行解密。-Lena grayscale images achieve encryption using Arnold transform, and then use the inverse transform of the image decrypting encrypted.