The essential differences between drilling geologic design of horizontal well and vertical well are "data encryption principle" and "two-time design principle".
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The essential differences between drilling geologic design of horizontal well and vertical well are "data encryption principle" and "two-time design principle".
依据断块油藏的地质特征和开发阶段，优化水平井的地质设计和生产参数，是保证水平井开发效果的关键。
First, it introduces the basic principle of the encryption of data, including key and two kinds of cipher system. Then, the chat system developed by us is given as an example.
首先介绍了数据加密的基本原理，包括密钥和两种密码体制然后，给出自行开发的交谈系统作为示例。
The encryption principle and index structure of encryption data are developed. The encryption processing of duplicate data and algorithm exposure are analyzed.
详细阐述了其加密原理和密文索引结构，对重复性数据的加密处理和算法抗攻击性进行了分析。
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