密码学浅谈-畅读网

　　　　

密码学浅谈

作者：文仲慧

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内容简介:

本书分为两篇：上篇给出广义密码、狭义密码、更狭义的密码的概念，并从密码发展历史沿革的视角介绍古典密码学和近代密码学，重点是通过直观、简洁的解释和实例，介绍现代密码学的主流密码算法；下篇通过示例和真实历史事件，进一步诠释古典密码学和近代密码学的应用。为了满足部分读者对密码破译和密码分析知识的需求，本书还专门介绍了M-209密码机以及更为抽象一些的密码分析知识和密码分析结果。

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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 45 LIMIT 1 [ RunTime:0.001232s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.001620s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.003468s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1771890398 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:0.618497s ]

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