Based on the difference expansion and difference shifting, a novel reversible watermarking algorithm for digital vector map is proposed.

利用差分平移和差分扩张，提出一种新的应用于数字矢量地图的可逆水印算法。

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For raising the efficiency of the reversible logic automatic born and optimization, we put forward the similar template technique and a type of fast algorithm.

为了提高可逆逻辑自动生成与优化的效率，我们提出了类模板技术和一类快速算法。

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Meanwhile, a reversible DES algorithm for data encryption transmission is used to ensure the security in the transmission.

在数据传输加密方面，采用国际上通用的DES算法来实现，保证传输过程中的安全可靠。

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