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2010年10月7日星期四

Internet attacks exponential


Viruses and Worms
The attacks are spreading exponentially through programs, quickly multiplying their numbers.
When a program, however, replied, speaking of worms, when attacking other programs, instead we talk about viruses.
The mathematics of their propagation is similar, and their distinction is not that important.
These programs thrive by exploiting bugs and common behaviors found in a large proportion of users or programs likely. They can spread worldwide within a few hours, potentially in a few minutes, and can cause devastating economic losses are spread over a 'larger community.
Reducing the risks
There are several ways to minimize the possibility of taking a virus. By definition, the least common is to stay out of the monoculture of the people. If you write your own operating system and applications, it is unlikely that you come infected. Microsoft Windows systems have traditionally hosted the vast majority of viruses, which means that Macintosh and Linux users have suffered less. But the situation is changing, especially for Linux users. Worms appeared to Linux and even multi-platform, which can spread via direct access to the network, as well as through Web pages and e-mail. If you do not communicate with a host infected, you can not catch the virus. An accurate control network access and file obtained from 'outside can drastically reduce the risk of being infected.
Keep in mind that there are also a number of viruses propagated by man, as is the case in which people forward messages (containing urban legends) to all their friends, inviting them to do the same. All this usually results in a nuisance, but can cause panic in individuals with little knowledge of computers. Some contain false messages that the recipient's computer is infected. In one case, the message was accompanied by information to delete a critical file systems, many people have damaged their machines by following these instructions.
Therefore, not only the threats of the network, but also the user's misconduct may cause the compromise of a machine.

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2010年4月21日星期三

so ideological segregation online

 

For all the remarkable power of the Internet, some journalists and scholars have worried that it is polarizing society because it’s so easy for Americans to confirm their prejudices by relying on Web sites Lenovo thinkpad t61 battery that share their viewpoints.
“Ideological segregation on the Internet is low in absolute terms ,” they conclude in a paper, “Ideological Segregation Online and Offline,” that challenges the work of some other scholars.
The economists do find ideological segregation online is greater than in broadcast and cable TV, magazines and local print newspapers, though they say it’s less than among readers of national print newspapers. From the available data Lenovo thinkpad r60 battery , they find no evidence that the Internet is becoming more ideologically segregated over time.
“Most of the people who visit sites like drudgereport frequented by conservatives or huffingtonpost frequently by liberals , by contrast, are heavy Internet users with a strong interest in politics… who tend to consumer more of everything online for thinkpad t60 battery ,” they add. “Their omnivorousness outweighs their ideological extremity, preventing their overall news diet from becoming too skewed.”
Then, borrowing a technique used to measure residential racial segregation, they classify sites Lenovo thinkpad t60p battery by the percentage of users who are self-identified conservatives. What’s more, a significant number of people go to many sites.Foxnews scores 88%, meaning that percentage of its users are conservative. Huffingtonpost scores 30%.
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