过滤方式 meaning in English
filter type
Examples
- Base on the research metioned above , this paper has put forward a solution for java - based web e - mail system with high security , of which the innovation points include : in the aspect of system structure , the system has adopted mvc pattern two , then adds a permanent level on this basis , which brings the 4 - levels structure : denotation level , logic level , operation level , permanent level to be ture , and improved the maintainability of the system . at the mean time , the basic classes of every level are encapsulated , which increases the expansibility of the system ; on the aspect of the security of e - mail , the system adopts double - encryption technology : the first layer adopts des encryption technology , which makes mail safely transmit in the network ; the second layer adopts shift - encryption technology , with which users can encrypt mail on the web interface . this is much more convenient and secure than before ; as to filtering garbage e - mails , the system adopts the double - filtration technology , it adopts content - based filtration in the mail server , carries on the filtration of the ip address and e - mail address at the console by looking over the log files in the e - mail server , while using regular expression to process the filtration of the html
针对以上研究,本文对基于java的安全web电子邮件系统的设计,提出了自己的解决方案,该方案具有以下的创新点:在系统架构方面,系统采用了mvc模式2的解决方案,在此基础上增加了持久层,实现了由表示层、逻辑层、业务层到持久层的四层架构,提高了系统的可维护性,同时系统还对每个层次的基本类做了一定程度的封装,提高了系统的可扩展性;在邮件私密性方面,系统采用了双重加密技术,第一层采用des加密技术,对邮件正文进行加密,使得邮件能够在网络上安全的传输。第二层使用移位加密,对des加密后的密文再进行一次加密,这样不仅方便了用户,使之在web界面上就可以进行加密,而且更进一步提高了系统的安全性;在垃圾邮件过滤方面,系统采用了双重过滤技术,在邮件服务器中采用基于内容的过滤方式,通过对邮件服务器中日志文件的查看,在控制台中进行ip地址以及邮件地址的过滤。