On the commercial side, we have experienced a denial-of-service attack related to the marketing vendor.
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The FBI issued an alert for consumers about the telephone denial-of-service attacks in June.
That means they could be used to launch a distributed denial-of-service attack on a victim's computer.
GitHub, the social coding service, has been plagued by two days of distributed denial-of-service attacks.
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The networks had been attacked by malicious codes, rather than distributed denial-of-service (DDoS) attacks as initially suspected.
In a new statement, Anonymous urged members not to participate in any denial-of-service attacks against the church's website.
Gox, a Tokyo-based exchange that handles roughly 80% of Bitcoin trading, recently shut down briefly after a denial-of-service attack.
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Some 29 institutions were affected by so-called distributed denial-of-service attacks (DDoS) which overload a site with data causing it to fall over.
It is a new twist on so-called denial-of-service attacks, in which hackers overload financial-services websites with information in order to crash them.
Anderson said the U.S. may end up with a new type of weaponry for launching massive distributed denial-of-service attacks and computer viruses.
The distributed denial-of-service attack failed to crash those payment networks, but David says Anonymous did manage to poke around their back-end computer systems.
Spamhaus accused Cyberbunker, a Dutch Web-hosting company, of coordinating the so-called distributed denial-of-service attack against it, according to a report by the British Broadcasting Corp.
Using the handle Flashboy, Ternovskiy soon mastered the art of the denial-of-service attack, wherein a target system is paralyzed by a mass of incoming communication requests.
Employees of banks could shut down computers that make quick arbitrage trades across markets, using denial-of-service attacks to overwhelm servers and potentially cause millions in losses.
However, the BBC was later told that experts had concluded it was not a denial-of-service attack, of the kind South Korea has experienced in the past.
The arrest comes a month after Internet users around the globe faced slowed-down service during the prolonged denial-of-service assault on The Spamhaus Project, a European spam-fighting group.
Hanna said Spamhaus experienced its first denial-of-service attack in 2003.
Those included posting private data, including credit-card and Social Security numbers, of Web users and launching distributed denial-of-service (DDoS) attacks against media sites who posted stories they didn't like.
In a tweet on its Twitter feed, MTGox said it was fighting off a distributed denial-of-service (DDoS) attack, which involves a site being bombarded with huge amounts of data.
Security firm Sophos's blog said that the attacks were carried out by spreading links via Twitter and other parts of the internet which carried out distributed denial-of-service (DDoS) attacks.
The courts have yet to decide who is liable if a computer system with lax security is used to launch a denial-of-service attack, but a number of lawsuits are pending.
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But he said denial-of-service attacks target specific Web sites.
The recent rash of distributed denial-of-service attacks on large American banks has disrupted the delivery of banking services to consumer and commercial customers over the Internet for hours at a time.
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Twitter said the site's blackout was caused by a "denial-of-service attack, " which likely means a hacker used a number of infected computers to send enough automated requests to the site to overwhelm it.
Russian hackers, meanwhile, took to the Net, launching waves of distributed denial-of-service attacks against the country's government, banking and media Web sites, using thousands of personal computers hijacked with hidden software to overload the servers.
Anonymous has risen to fame in recent months for its "hacktivism", which has seen it launch denial-of-service attacks against firms it saw as pursuing policies that are in opposition to its freedom of the web ideals.
This sudden surge of requests, which were cancellations for a large batch of orders that the machine had never actually sent out, acted like a denial-of-service attack on some parts of the New York Stock Exchange.
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Indeed, even putting elections aside, reports of denial-of-service attacks, stolen passwords and other cases of Internet invasion are regular occurrences in the news -- and they've affected major corporations, government agencies and even security companies, Jefferson observes.
But the trick could be scaled up to hundreds or thousands of fake signals, much like a denial-of-service attack that uses thousands of computers to choke a website with a flood of fraudulent requests for information, Costin says.
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Rouland points out that ISS Tuesday discovered a chat room called "IP Victims" on Yahoo that is being used for the exchange of IP addresses of machines compromised by the Trojan horse Back Orifice and an older distributed denial-of-service attack tool called Sub Seven.
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