兜兜`毕业论文摘要中文翻译英文

摘要：
Abstract：
电子商务的发展正在改变着传统的贸易方式，缩减交易程序，提高办事效率。现在，许多网站都提供有“商城”，供网民在网上购物。密保卡一般为实物卡，在卡上矩阵形式印有若干字符，用户在登陆时，服务器会随机给出一组卡坐标从卡片中找到字符串组合组合并输入，只有字符串组合输入正确，用户才能正常登陆，该组合登陆后即失效。将用户帐号与某一或几个手机号绑定.在帐号登陆前.用户需要使用绑定的手机与运营商认证系统通讯.解开帐号锁.方能登陆。所谓验证码，与服务器端保存的字符串相同，才能继续操作。验证码安全技术同样是一种在用户帐户已经泄露的情况下，保护拥护帐户安全的方法。针对现在市场中日益严重的安全性问题，验证码安全技术不失为一种极好的用户帐号保护方案。
The development of e-commerce is changing the traditional trade way, reduce the trade procedure, improve speed. Now, a lot of websites offer to " the store ", for netizens to do shopping on the net. Protect the card to generally block densely for the material object, the matrix form prints several characters on the card, users, while landing, the server will provide a group of card coordinates and find the string association and input from the card at random, only the string association is input correctly, users could land normally, should lose efficiency promptly after making up and landing. Tie user's account number and some on