Tablet PC

There's a new breed of PC around these days: the Tablet PC. Spor ting a specially modified version of Windows XP to suppor t its mobile and touch-screen functions, Tablets are per fect for anyone whose job requires a lot of travelling, but still needs them to have near-constant access to a PC. Heavy and bulky laptops can only really be used while you're sitting down, and still depend on standard keyboard and mouse inputs. Tablet PCs use a magnetic pen to literally write straight onto the screen, so you can even use it standing up on a train. Even if you don't need it for business, a Tablet can improve your home computing experience – you can use it to browse the internet or watch movies while in bed, or use its unique capabilities to read books or send handwritten emails.  Over the next six pages, we’ll tell you exactly how Microsoft Windows XP: Tablet PC Edition will change your life in the office, at home and on the road, with some
top tips on how it’s being used by different people and industries across the world and why it's more environmentally friendly. We’ll also give you some great advice on how its special functions can be seamlessly used in conjunction with your existing PC and a full range of peripherals. There are hundreds of potential uses for Tablet PCs and they’re revolutionising the world of mobile computing. The laptop is definitely advancing to its next evolution…

Readmore...

Clean-up

A tidy house is a happy house, and the same applies to your PC. Getting rid of all the junk and unnecessary files that build up over time will give you a much more efficient machine. Everything wants a piece of Windows XP. Every application you install, web page you visit or email you download leaves pieces of itself all over your system, all of which takes up valuable hard drive space and can even slow down your PC's per formance. Regular house cleans are necessary to clean out the detritus and they have the added benefit of giving your system that straight-from-the-shop feel all over again. In issue 10’s lead feature we unear thed
the 50 best ways to use Windows XP to give itself a good old wash behind the ears and get running at full pelt again, without any of the accumulated rubbish from months of PC usage slowing it down. You can discover which files are safe to delete, how to completely remove an old application from your system, how to pick
and choose which programs and processes are loaded whenever you boot up your PC, which types of file take up the most space and impact most heavily on per formance and how to improve hard drive efficiency.
Nothing's too complicated either. Most of these tips can be carried out in just a few seconds and one decent clean up a month should keep your PC running smoothly, leaving you with tons of space to install new
programs and store your documents.

Readmore...

Improving password security

When trying to improve the security of password based authentication, one wants to prevent attackers from
eavesdropping on passwords in transit, and from mounting offline dictionary attacks, namely attacks that enable
the attacker to check all possible passwords without requiring any feedback from the server. Eavesdropping attacks can be prevented by encrypting the communication between the user and the server, for example using SSL. Offline dictionary attacks are prevented by limiting access to the password file (and can be made even harder by adding well-known measures such as the use of salt).

Readmore...

Global password attacks

Consider a system that has many user accounts, and which enables logins over a network that is accessible to
hackers. (Again, we do not assume that the attackers can sniff network traffic, we only assume that they can
connect to the network and try to login to the server, pretending to be a legitimate user.) Consider an attacker that is interested in breaking into any account in the system, rather than targeting a specific account. The  attacker can try many login attempts in parallel and circumvent the timing measure using the fact that user logins are typically handled by servers that can handle many login sessions in parallel. For example, the attacker can send a login attempt every 10 milliseconds, obtaining a throughput of 100 login attempts per second, regardless of how long the server delays the answers to the login attempts. The account locking feature can also be circumvented by such a “global” attacker, if it tries to login using different username/password pairs, and operates without trying the same user name twice. Since every user name is used only once, the “account with many failed login attempts” alarm is never triggered.

Readmore...

About passwords

Passwords are the most common method of authenticating users, and will most likely continue to be widely used for the foreseeable future, due to their convenience and practicality for service providers and end-users. Although more secure authentication schemes have been suggested in the past, e.g., using smartcards or public key cryptography, none of them has been in widespread use in the consumer market. It is a well known problem in computer security that human chosen passwords are inherently insecure since a large fraction of the users chooses passwords that come from a small domain . A small password domain enables adversaries to attempt to login to accounts by trying all possible passwords, until they find the correct one. This attack is known as a “dictionary attack”. Successful dictionary attacks have, e.g., been recently reported against eBay user accounts, where attackers broke into accounts of sellers with good reputations in order to conduct fraudulent auctions.

Readmore...

Attack structure

Web site: the client (or attacker), a firewall, the Web server, and perhaps a separate SQL server and fi  le server to store uploaded documents. In the early days of Web security, most hacks made use of vulnerabilities in the Web server software, the operating system hosting it, or the ancillary services running on it (such as FTP or email).Often, an exploit in the operating system or Web server would allow access to the underlying file system, or allow an attacker to run code on the hosting machine. During the late 1990s, Microsoft’s reputation for security was poor because exploits came out against Windows and IIS on a regular basis. Administrators would find themselves installing a patch against one problem, only to find another unpatched problem was now being exploited. The poor reputation for security undoubtedly resulted in lost sales, but it also resulted in a push at Microsoft to develop more secure systems by changing the company’s development process.

Readmore...

Web in my eyes

Now i Study in national university of Mongolia. In few countries it is very popular. But while i'm studying here i think it is very easy. You just do your homework. When we become 3rd grade we need choose the deep occupation. We have two choices 1. Program developer 2. Web developer. Now in my eyes if you have a very good idea that no one even imagined you make that idea live with web. Why Web? Because the main thing is internet. For example facebook right it just depends on the idea. Share people your life. just idea right. So web in my eyes is the art of code including necessary informations.

Readmore...