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Example 1 : More like synergy software. But synergy works using internet. I was thinking of bluetooth route.

Example 2 : This has been implemented in android Android App

But in android, there is dedicated application in PC(Java) and a app in android. But normal bluetooth keyboard dont run dedicated software, you can just use it out of the box.

So cant we just make the laptop-keyboard+bluetooth detect as a bluetooth keyboard?

PS: Everybody says buy a wireless keyboard, they are damn cheap. But I am thinking when a software can do the task, why buy a hadware? Also I just want to check the wireless bluetooth function of my old nokia e63 mobile, so its of temporary use.

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Whats wrong with the question? Is it logically incorrect? –  S P Jul 3 '13 at 13:25
    
It is badly worded. You are asking if it is possible to share a computers keyboard via bluetooth. Scrap the part about malware/virus or leave it as an example. –  peanut_butter Jul 3 '13 at 14:19
    
Thanks @peanut_butter , review the question now. –  S P Jul 3 '13 at 15:07
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4 Answers

If a virus/malware/whatever is intercepting keystrokes, then changing the method of connection to the PC is irrelevant. USB, wireless, Bluetooth, PS2, AT, etc, it doesnt matter.

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You seriously thought that I wanted to modify a malware and send the keystroke via bluetooth? I just gave an example of malware. I was thinking of a proper software, and not changing the method of connecting of malware to PC(is it even possible?) –  S P Jul 3 '13 at 13:39
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The method that I use is to run vnc server on the tablet and vnc viewer on the keyboard-laptop. You can use Bluetooth to connect the 2 devices together using the Personal Area Network feature. This solution works only if you have Windows, Mac OS or Linux on the device being controlled. See http://www.realvnc.com for details.

The graphics is going to be disappointing, but at least you can use your keyboard and mouse from your laptop.

There are also other vnc software such as tightvnc and ultravnc but I didn't try them.

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Sure you can, if you write it.

All you need is a piece of software that receives keystrokes from the keyboard and advertises a Bluetooth input device service. There's nothing inherently different about the Bluetooth chip in your mouse or keyboard; it's just advertising itself as offering a service (one that computers typically don't offer).

You're unlikely to find a piece of software that does this, because as you said, wireless keyboards do it, and as you said, "they're damn cheap."

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On Macs, the application type2phone offers exactly this functionality. As long as this application is active (i.e. not in the background), all keyboard input is sent to a paired iPhone (or in fact, any device that supports input from bluetooth keyboards). No software whatsoever needs to be installed on the target device, since all it sees is a generic bluetooth keyboard. Actually i have been looking for a windows pendant to type2phone, but haven't found one yet.

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