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He warns that the device can be dangerous because it doesn’t necessarily meet normal electrical standards and users without a good electrical background shouldn’t try to build one. The hardware portion of KeySweeper is designed to be as inconspicuous as possible, and Kamkar said it can be built with or without the GSM motherboard. This means even if we do not know the MAC address, we can decrypt the keystroke, as the alignment will never change, and 0xCD is always the first byte of the MAC.” “After further investigation, I found that since we now know all Microsoft keyboards begin with 0xCD as the MAC address, the actual keystroke (in orange below) happens to be aligned with the first byte of the MAC address (0xCD). This “encryption” is the equivalent of taking a deck of cards, cutting it once, and calling it shuffled,” Kamkar said. “Thorsten and Max discovered the keystrokes are simply encrypted (xor’d) with the MAC address in ECB mode, which we are able to sniff after using Travis’ method of abusing the nRF24L01+ to both sniff and reveal MAC addresses.
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With that done, he then set about figuring out how to decrypt the keystrokes, which are encrypted as they move from the keyboard to the dongle. Kamkar spells out the process for determining the kind of chip that the keyboard is using and the frequency and protocol it’s using to communicate with the USB dongle. The KeySweeper project builds on previous work from Travis Goodspeed and Thorsten Schröder and Max Moser.
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The effective range of the KeySweeper device is likely about the typical range of a Bluetooth device, he said, but that could be extended using a low-noise amplifier. Kamkar said he picked Microsoft’s keyboards after going into Best Buy and seeing which models seemed to be the most prevalent. Wireless keyboards have become a popular option for users wanting to connect to a laptop. “ If KeySweeper is removed from AC power, it appears to shut off, however it continues to operate covertly using an internal battery that is automatically recharged upon reconnecting to AC power,” Kamkar said in a post explaining the new device. “KeySweeper has the capability to send SMS alerts upon certain keystrokes being typed, e.g. When it’s plugged into a wall socket, the KeySweeper will connect to a nearby Microsoft wireless keyboard and passively sniff, decrypt and record all of the keystrokes and send them back to the operator over the Web. The components are inexpensive and easily available, and include an Arduino microcontroller, the charger itself and a handful of other bits.
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The device is known as KeySweeper and Kamkar has released the source code and instructions for building one of your own. Hardware hacker and security researcher Samy Kamkar has released a slick new device that masquerades as a typical USB wall charger but in fact houses a keylogger capable of recording keystrokes from nearby wireless keyboards.
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Online security expert Graham Cluley told the Guardian “There’s no guarantee that whoever gained access to them hasn’t got a whole lot more in their back pocket which they haven’t chosen to release to the rest of the world.” “There is no mention of the security breach on Minecraft’s homepage, but my recommendation would be that if users have any concern that their accounts might be exposed to hackers that they should change their passwords immediately.”It goes without saying that they should be particularly concerned if they are using the same password anywhere else on the web.” Some experts believe more accounts could have been compromised and may have their details leaked at a later date.
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Minecraft has over 100 million players across the globe and was purchased by software giant Microsoft for $2.5billion in September 2014. The reported hack could have serious implications for those named online as both email addresses and passwords have been published, meaning other online services using the same details could be vulnerable to being accessed without user consent. German publication Heise claims 1,800 accounts have been compromised, although many more could be affected. That’s according to new reports that claim player details have been published in a plain-text format, allowing anyone to to access those Minecraft accounts, download the game to their own computers and play online. THE EMAIL addresses and passwords of more than 1,800 Minecraft accounts have been revealed online this week.