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.
標(biāo)簽： implementation Tunnelling Protocol xl2tpd
上傳時(shí)間： 2014-01-20
上傳用戶：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.
標(biāo)簽： Identity Protocol Host implemetation
上傳時(shí)間： 2016-09-01
上傳用戶：皇族傳媒
從鍵盤讀入一個(gè)四位的十六進(jìn)制數(shù)，CRT顯示等值的二進(jìn)制數(shù). 由于每個(gè)十六進(jìn)制數(shù)位對(duì)應(yīng)4個(gè)二進(jìn)制，所以每讀入一個(gè)十六進(jìn)制位后，即可將其對(duì)應(yīng)的4個(gè)二進(jìn)制位依次輸出。由于數(shù)字‘０’~ ‘９’的ASCⅡ碼為30H～39H,字母‘a(chǎn)’～‘f’與 ‘A’～‘F’的ASCⅡ碼為61H～66H 與41H～46H ，因此，如果輸入的字母為數(shù)字‘０’～‘９’，則其低４位即為對(duì)應(yīng)的二進(jìn)制位；如果輸入的字符為字母‘ａ’～‘ｆ’或‘Ａ’～‘Ｆ’，則需要減７，然后通過移位將低４位依次輸出。
上傳時(shí)間： 2014-01-24
上傳用戶：yzhl1988
RSA算法是第一個(gè)能同時(shí)用于加密和數(shù)字簽名的算法，也易于理解和操作。RSA是被研究得最廣泛的公鑰算法，從提出到現(xiàn)在已近二十年，經(jīng)歷了各種攻擊的考驗(yàn)，逐漸為人們接受，普遍認(rèn)為是目前最優(yōu)秀的公鑰方案之一。RSA的安全性依賴于大數(shù)的因子分解，但并沒有從理論上證明破譯RSA的難度與大數(shù)分解難度等價(jià)。即RSA的重大缺陷是無法從理論上把握它的保密性能如何，而且密碼學(xué)界多數(shù)人士?jī)A向于因子分解不是NPC問題。 RSA的缺點(diǎn)主要有：A)產(chǎn)生密鑰很麻煩，受到素?cái)?shù)產(chǎn)生技術(shù)的限制，因而難以做到一次一密。B)分組長(zhǎng)度太大，為保證安全性，n 至少也要 600 bits 以上，使運(yùn)算代價(jià)很高，尤其是速度較慢，較對(duì)稱密碼算法慢幾個(gè)數(shù)量級(jí)；且隨著大數(shù)分解技術(shù)的發(fā)展，這個(gè)長(zhǎng)度還在增加，不利于數(shù)據(jù)格式的標(biāo)準(zhǔn)化。目前，SET( Secure Electronic Transaction )協(xié)議中要求CA采用比特長(zhǎng)的密鑰，其他實(shí)體使用比特的密鑰
上傳時(shí)間： 2014-10-13
上傳用戶：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
標(biāo)簽： Aspect-Oriented Developement streamline Software
上傳時(shí)間： 2013-12-01
上傳用戶：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
標(biāo)簽： BlackBerry computing enhance mobile
上傳時(shí)間： 2016-12-07
上傳用戶：GavinNeko
1、用RS－232C的零MODEM的連接法連好兩機(jī)的連線； 2、用DEBUG的O命令將一數(shù)發(fā)送到串行口(2F8H/3F8H)，然后在另一臺(tái)機(jī)上用 I命令讀入串行口的內(nèi)容。如果發(fā)送的的內(nèi)容與接受的內(nèi)容一直，說明兩機(jī)已經(jīng)連好線，否則必須檢查連線，直到兩機(jī)可通訊為止； 3、編一程序，將一臺(tái)機(jī)的鍵盤輸入的鍵值通過RS-232C口送到另一臺(tái)機(jī)，并在CRT上顯示鍵值； 4、編一程序，通過RS-232C口進(jìn)行一臺(tái)機(jī)到另一臺(tái)機(jī)的文件復(fù)制。
上傳時(shí)間： 2017-01-10
上傳用戶：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.
標(biāo)簽： OpenPGP implementation SharpPrivacy developed
上傳時(shí)間： 2017-01-13
上傳用戶：dreamboy36
1. 設(shè)計(jì)要求： 1．彩色界面，界面清晰美觀，色彩協(xié)調(diào)。 2．使用DOS系統(tǒng)的0AH號(hào)子功能接受用戶鍵入的字符串。 3．建議按下圖設(shè)計(jì)用戶界面，顏色自選。 注：雙線框由若干CRT顯示符組成，相應(yīng)的CRT顯示符（十進(jìn)制數(shù)）已經(jīng)標(biāo)注在右圖中。1. 設(shè)計(jì)要求： 1． 轉(zhuǎn)化內(nèi)容選擇下列一項(xiàng)：二進(jìn)制數(shù)→十六進(jìn)制數(shù)顯示，二進(jìn)制數(shù)→十進(jìn)制數(shù)顯示，十進(jìn)制數(shù)→二進(jìn)制數(shù)顯示，十進(jìn)制數(shù)→十六進(jìn)制數(shù)顯示，十六進(jìn)制數(shù)→二進(jìn)制數(shù)顯示。 2． 給出適當(dāng)?shù)奈淖痔崾? 3． 程序要求保護(hù)措施，對(duì)于非法鍵入不受理，但回顯，顯示錯(cuò)誤信息。 4．具體顯示格式，例如：0111100010011010=789AH1. 設(shè)計(jì)要求： 1.統(tǒng)計(jì)并且顯示負(fù)數(shù)的個(gè)數(shù)。 2.找出真值最大的數(shù)，并以十六進(jìn)制的形式，顯示在屏幕上，顯示格式為：MAX= H 3.數(shù)據(jù)自己在數(shù)據(jù)段進(jìn)行定義，個(gè)數(shù)至少為8個(gè)。1. 設(shè)計(jì)要求： 1.動(dòng)態(tài)畫一個(gè)實(shí)心圓球 2.位置在屏幕中央，變化情況是：逐漸“膨脹”的或者逐漸“收縮”的。
標(biāo)簽： 彩色
上傳時(shí)間： 2014-01-08
上傳用戶：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.
標(biāo)簽： server-supported Description developers Microsoft
上傳時(shí)間： 2017-02-07
上傳用戶：refent
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