xl2tpd is an implementation of the Layer 2 Tunnelling Protocol (RFC 2661). L2TP allows you to tunnel PPP over UDP. Some ISPs use L2TP to tunnel user sessions from dial-in servers (modem banks, ADSL DSLAMs) to back-end PPP servers. Another important application is Virtual Private Networks where the IPsec protocol is used to secure the L2TP connection (L2TP/IPsec, RFC 3193). The L2TP/IPsec protocol is mainly used by Windows and Mac OS X clients. On Linux, xl2tpd can be used in combination with IPsec implementations such as Openswan.
标签： implementation Tunnelling Protocol xl2tpd
上传时间： 2014-01-20
上传用户：Altman
Host Identity Protocol on Linux is an implemetation of the Host Identity Protocol (HIP) and the related architecture. HIP is a proposal to change the TCP/IP stack to securely support mobility and multi-homing. Additionally, it provides for enhanced security and privacy and advanced network concepts, such as moving networks and mobile ad hoc networks. HIP is "cool", which means that as a mobile VPN solution, when your network interfaces go up or down, there is no need to re-establish a secure tunnel.
标签： Identity Protocol Host implemetation
上传时间： 2016-09-01
上传用户：皇族传媒
从键盘读入一个四位的十六进制数，CRT显示等值的二进制数. 由于每个十六进制数位对应4个二进制，所以每读入一个十六进制位后，即可将其对应的4个二进制位依次输出。由于数字‘０’~ ‘９’的ASCⅡ码为30H～39H,字母‘a’～‘f’与 ‘A’～‘F’的ASCⅡ码为61H～66H 与41H～46H ，因此，如果输入的字母为数字‘０’～‘９’，则其低４位即为对应的二进制位；如果输入的字符为字母‘ａ’～‘ｆ’或‘Ａ’～‘Ｆ’，则需要减７，然后通过移位将低４位依次输出。
上传时间： 2014-01-24
上传用户：yzhl1988
RSA算法是第一个能同时用于加密和数字签名的算法，也易于理解和操作。RSA是被研究得最广泛的公钥算法，从提出到现在已近二十年，经历了各种攻击的考验，逐渐为人们接受，普遍认为是目前最优秀的公钥方案之一。RSA的安全性依赖于大数的因子分解，但并没有从理论上证明破译RSA的难度与大数分解难度等价。即RSA的重大缺陷是无法从理论上把握它的保密性能如何，而且密码学界多数人士倾向于因子分解不是NPC问题。 RSA的缺点主要有：A)产生密钥很麻烦，受到素数产生技术的限制，因而难以做到一次一密。B)分组长度太大，为保证安全性，n 至少也要 600 bits 以上，使运算代价很高，尤其是速度较慢，较对称密码算法慢几个数量级；且随着大数分解技术的发展，这个长度还在增加，不利于数据格式的标准化。目前，SET( Secure Electronic Transaction )协议中要求CA采用比特长的密钥，其他实体使用比特的密钥
上传时间： 2014-10-13
上传用户：sz_hjbf
Aspect-Oriented Software Developement Coverage includes Using AOSD to streamline complex systems development without sacrificing flexibility or scalability How AOSD builds on the object-oriented paradigmand how it s different State-of-the-art best practices for the AOSD development process Languages and foundations: separating concerns, filter technologies, improving modularity, integrating new features, and more Using key AOSD tools, including AspectJ, Hyper/J, JMangler, and Java Aspect Components Engineering aspect-oriented systems: UML, concern modeling and elaboration, dependency management, and aspect composition Developing more secure applications with AOSD techniques Applying aspect-oriented programming to database systems Building dynamic aspect-oriented infrastructure
标签： Aspect-Oriented Developement streamline Software
上传时间： 2013-12-01
上传用户：jennyzai
BlackBerry Hacks will enhance your mobile computing with great tips and tricks. You ll learn that the BlackBerry is capable of things you never thought possible, and you ll learn how to make it an even better email and web workhorse: Get the most out of the built-in applications Take control of email with filters, searches, and more Rev up your mobile gaming--whether you re an arcade addict or poker pro Browse the web, chat over IM, and keep up with news and weblogs Work with office documents, spell check your messages, and send faxes Become more secure, lock down your BlackBerry and stash secure information somewhere safe Manage and monitor the BlackBerry Enterprise Server (BES) and Mobile Data System (MDS) Create web sites that look great on a BlackBerry Develop and deploy BlackBerry applications
标签： BlackBerry computing enhance mobile
上传时间： 2016-12-07
上传用户：GavinNeko
1、用RS－232C的零MODEM的连接法连好两机的连线； 2、用DEBUG的O命令将一数发送到串行口(2F8H/3F8H)，然后在另一台机上用 I命令读入串行口的内容。如果发送的的内容与接受的内容一直，说明两机已经连好线，否则必须检查连线，直到两机可通讯为止； 3、编一程序，将一台机的键盘输入的键值通过RS-232C口送到另一台机，并在CRT上显示键值； 4、编一程序，通过RS-232C口进行一台机到另一台机的文件复制。
上传时间： 2017-01-10
上传用户：stvnash
SharpPrivacy has been developed to be an Open Source implementation of the OpenPGP standard. OpenPGP is a standard for encrypting, decrypting, signing and verifying data cryptographically. The OpenPGP protocoll is commonly used and is said to be very secure.
标签： OpenPGP implementation SharpPrivacy developed
上传时间： 2017-01-13
上传用户：dreamboy36
1. 设计要求： 1．彩色界面，界面清晰美观，色彩协调。 2．使用DOS系统的0AH号子功能接受用户键入的字符串。 3．建议按下图设计用户界面，颜色自选。 注：双线框由若干CRT显示符组成，相应的CRT显示符（十进制数）已经标注在右图中。1. 设计要求： 1． 转化内容选择下列一项：二进制数→十六进制数显示，二进制数→十进制数显示，十进制数→二进制数显示，十进制数→十六进制数显示，十六进制数→二进制数显示。 2． 给出适当的文字提示 3． 程序要求保护措施，对于非法键入不受理，但回显，显示错误信息。 4．具体显示格式，例如：0111100010011010=789AH1. 设计要求： 1.统计并且显示负数的个数。 2.找出真值最大的数，并以十六进制的形式，显示在屏幕上，显示格式为：MAX= H 3.数据自己在数据段进行定义，个数至少为8个。1. 设计要求： 1.动态画一个实心圆球 2.位置在屏幕中央，变化情况是：逐渐“膨胀”的或者逐渐“收缩”的。
标签： 彩色
上传时间： 2014-01-08
上传用户：Divine
Description: Microsoft?Windows?HTTP Services (WinHTTP) provides developers with a server-supported, high-level interface to the HTTP/1.1 Internet protocol. WinHTTP is designed to be used primarily in server-based scenarios by server applications that communicate with HTTP servers. WinHTTP is also designed for use in system services and HTTP-based client applications. WinHTTP is more secure and robust than WinInet. However, single-user applications that need FTP or gopher functionality, cookie persistence, caching, automatic credential dialog handling, Internet Explorer compatibility, or downlevel platform support should still consider using WinInet.
标签： server-supported Description developers Microsoft
上传时间： 2017-02-07
上传用户：refent
