Friday, 26 April 2013

How to Crack Wi-Fi Passwords with Your Android Phone and Get Free Internet!

Want to take advantage of your neighbor's super fast Wi-Fi connection? If they're smart, they probably have it password protected (otherwise you wouldn't be reading this, would you?). But if you have an Android phone, you can get back at them for always parking in your spot and slamming the door when they get home at 2 a.m.—by stealing...er, borrowing, their connection.

A group of researchers came up with a hack to get around hardware limitations and add monitor mode to Android devices to allow them to crack Wi-Fi passwords.
 
(http://bcmon.blogspot.com/2012/09/working-monitor-mode-on-nexus-one.html)
 

  




Monitor mode lets you see all the traffic going through a network and how many devices are connected to it, but it can also be used for more nefarious purposes. If you're patient enough, you can crack the WEP key on a network by capturing data packets in monitor mode.

To add monitor mode to an Android device, the researchers reverse engineered the Broadcom radio chip. They modified the firmware on the chipsets in the Nexus One and Galaxy S II, which are the same ones used in the majority of mobile devices. The code is posted on Google Code(https://code.google.com/p/bcmon/), but you'll need to know which chipset you have and download the right one for your phone.

Once you've downloaded the code, it's as simple as extracting the .zip file, then running the setup and configuration files. They've included instructions for each chipset and a few different devices on their blog(http://bcmon.blogspot.com/), so head over there to find the specifics for yours.
After it's up and running, check out one of the tutorials(http://tag.wonderhowto.com/crack-wep-key/) to learn how to use it to crack the key. So, next time your neighbor wants to borrow your power drill, rest assured that you're "borrowing" something much more valuable from them!

Monday, 22 April 2013

White Hole Theory


Do White Holes Exists on Space. How they are created?



A new study explains why astronomers have never seen one of these weird objects.

Black holes are among the most exotic of astrophysical objects and consequently one of the most deeply studied. White holes, on the other hand, are largely ignored by astrophysicists. So it’s time, therefore, to change the balance with some deeper theoretical development of the properties of these objects, says Stephen Hsu at the University of Oregon in Eugene.
White holes are closely linked with black holes, being their time-reversed equivalent. The thinking is that whatever black holes can do, white holes also do in reverse.

That leads to an odd conclusion. In the 1970s, Stephen Hawking showed that in certain circumstances black and white holes become identical. When they are in thermal equilibrium with their surroundings, he said, they ought to absorb and emit the same amount of radiation and therefore be indistinguishable.

But what of black and white holes in other circumstances? Nobody has been quite sure, until now. Hsu tackles this question by examining how white holes would behave in isolation, surrounded by empty vacuum.

He points out that the time reversal symmetry of black and white holes only works when they are in equilibrium with their surroundings. But when they are in isolation, they are not in equilibrium. In this case, a black hole emits radiation in the form of hawking radiation. However, the white hole does not behave in a time reversed fashion; it does not absorb any radiation because it is isolated in space.

So the black hole gradually evaporates as it emits Hawking radiation, but the white hole cannot perform the time reversed operation which would be to absorb radiation because there is none to absorb. Instead, it is forced to explode, releasing large amounts of thermal energy, concludes Hsu. “Isolated white holes explode into quasithermal radiation,” he says.

He also says that while it is possible to construct an eternal black hole that lasts forever (as long as it isn’t disturbed), a similar state does not appear to be possible to white holes.
Which may mean that stable white holes cannot exist in empty space. A conclusion that appears to be backed up by the fact that a white hole or anything like has never been spotted in space.