The reasons that rated speeds are unattainable in real world settings are interesting and bear some discussion before we get to our testing. Remember when car makers used to advertise engine horsepower based on the potential possible when an engine was running on a stand without exhaust systems, emissions controls, power assist motors, and other power-robbing accessories and necessities attached?
The same specification-based practice formerly used by car companies is pervasive today in the PC industry, with the rated numbers often never attainable in real world applications. One exception is dial-up modem speed ratings where now all 56K modems are advertised and sold with disclaimers that the rated speed is basically never available.
A similar truth-in-ratings exists with monitors, where nominal and viewable diagonal screen dimensions are both listed. Rated printer speeds comes to mind as a commonly overstated specification. The ratings for dot matrix printers, for example, were based on how fast a printer could potentially print a single line, multiplied by the number of lines on a page, not taking into account direction changes, carriage print head returns, and page feeding times.
Another area where the rated numbers are unrealistic is wireless networking. As they were able to generate packets per second, they were able to hit the 85, mark in At this time, the researchers' tool, aircrack-ptw source code —which they say is similar to aircrack-ng —does not work on bit WPA.
The attack itself is nothing new. As early as , researchers demonstrated vulnerabilities in the RC4 stream cipher that forms the basis for WEP. It wasn't long before bit WEP was cracked; by , bit WEP could be broken with as few as , recovered packets. The news here is not that WEP isn't especially secure—that fact is already well-known.
What is important to note is the speed with which someone with a Centrino laptop and the proper tools can compromise a WEP-protected network. Holiday Gift Guide. Phone accessories. Tablet accessories. Watch accessories. Shop all plans. Shared data. International services. Connected devices. Those who serve.
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