That means they can fall victim to all kinds of viruses, worms and malicious code.
They got ahead of creating new technologies that prevented servers and individual computers from malicious code.
Telecommunications companies play a crucial role in cybersecurity because malicious code typically travels over their networks.
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In the past two months, the company has found more than a hundred specimens of Mac-targeted malicious code.
Called Operation b70, Microsoft's investigation found that some PCs were being sold with malicious code already installed on them.
This is often a ploy used to deposit spyware onto and malicious code onto people's machines without them realising.
The goal of the research is to reduce the threat of security breaches caused by flawed applications or malicious code.
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In 2010 a Malaysian man pleaded guilty to adding "malicious code" to the Fed's network via one of its regional banks.
But the black matrix bar code symbols have become a harbor for malicious code writers who devise ways to steal personal data.
Android has been the favorite of malicious code writers since August 2010, when the first Trojan program targeting the OS was detected.
The hole means that an attacker can hide malicious code on a webpage or an e-mail containing files with the wmf extension.
All three suspects, two men and a woman, are from Stoke-on-Trent and are accused of using the malicious code to defraud victims.
It all starts with a malicious code pasted over a legitimate one.
More than other strains of malicious code, the Storm worm has proven itself difficult to outsmart since it was discovered in January 2007.
"Once they have control of the machine they have the potential to put any kind of malicious code on there, " said Mr Evans.
In its security advisory, Microsoft labeled three of the bulletins "critical, " meaning an attacker could remotely execute malicious code on unpatched systems.
That missing safeguard matters: All Apple products use Data Execution Prevention, or DEP, a feature that prevents malicious code from running its own commands.
South Korea's communication watchdog said the attacks were caused by malicious code, but it didn't have any evidence linking the attack to North Korea.
The New York Times (registration required) takes a deeper look at what happens to computers that get infected by malicious code and taken over.
By the time the good guys had shut down Web sites hosting Sobig's malicious code at Geocities, Sobig already had gone through a sixth version.
"Chat is a conduit for distribution of malicious code, " Rouland says.
Interest in the Android OS as a malicious code writers fave will continue this year, yielding more mobile viruses and new malware codes for users to dodge.
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For nearly a year, cyber-security researchers have tracked the Storm worm as its malicious code spread across the Internet, drawing computers into a growing botnet of hijacked computers.
Attachments to e-mails remain a particularly easy place to store malicious code of all sorts, so be sure of an attachment's provenance before you open or save it.
The South Korean cyber investigation unit has sent investigators to the two file-sharing sites that are believed to have spread the malicious code, according to the National Police Agency.
There are a number of ways that the handset owner could be duped into running malicious code, and the most likely is being duped into visiting a malicious website.
The vulnerability exists because Windows incorrectly parses shortcuts in such a way that malicious code may be executed when the user clicks the displayed icon of a specially crafted shortcut.
There were also reports of skulls popping up on some computer screens, which could indicate that hackers had installed malicious code in the networks, the Korean Internet Security Agency said.
Researchers at the Black Hat conference showed just what mischief a commonly used UK PoS terminal could get up to when they inserted a chip-and-pin card crafted with malicious code.
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"An attacker can craft a malicious internet link to execute malicious code remotely on victim's system, which has Origin installed, " wrote the researchers in a paper detailing their work.
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