At work I am using a wireless mouse and keyboard. I was sitting at my desk this morning wondering if and how they are secured against key loggers.

What stops another device from listening to my key strokes and looking for things like:

www.mybank.com<tab>1111222233334444<tab>mypassword

Is the assumption that the range on these devices is too small to be listened to by a malicous person?

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Wireless keyboards should be considered insecure unless they specifically state they use channel encryption.

Do a google search for 'keykeriki' - it's a sniffing tool for wireless keyboards.

eg: http://www.symantec.com/connect/blogs/wireless-keyboard-vulnerability

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It is possible to "sniff" the transmission, but yes due to the limited range and the fact that most of the devices are "paired" to one another it is harder to "sniff" this signal, than ,for example, cracking the wireless and collecting packets from there.

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