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Thread: got wifi? a cordless phone? I can see you inside your home!

  1. #1

    got wifi? a cordless phone? I can see you inside your home!

    $#@! a bunch a wireless
    throw it in the weeds

    scholarly version:
    MIT Technology Review
    by Emerging Technology from the arXiv November 2, 2018

    Using Wi-Fi to “see” behind closed doors is easier than anyone thought

    With nothing but a smartphone and some clever computation, researchers can exploit ambient signals to track individuals in their own homes.

    Wi-Fi fills our world with radio waves. In your home, in the office, and increasingly on city streets, humans are bathed in a constant background field of 2.4- and 5-gigahertz radio signals. And when people move, they distort this field, reflecting and refracting the waves as they go.

    That’s given more than one group of researchers an interesting idea. In theory, they say, it ought to be possible to use this changing electromagnetic field to work out the position, actions, and movement of individuals. Indeed, several groups have created imaging systems that use Wi-Fi to “see” through walls.

    But all these systems have drawbacks. For example, they rely on knowing the exact position of the Wi-Fi transmitters involved and need to be logged in to the network so that they can send known signals back and forth.

    That isn’t possible for the ordinary snooper or peeping tom, who might typically have access only to off-the-shelf Wi-Fi sniffers such as those built into smartphones. This kind of set-up is just too basic to reveal any useful detail about what goes on behind closed doors, other than the presence of the Wi-Fi network itself.

    At least, that’s what everybody thought. Today that changes thanks to the work of Yanzi Zhu at the University of California, Santa Barbara, and colleagues. These guys have found a way to see through walls using ambient Wi-Fi signals and an ordinary smartphone.

    They say the new technique allows an unprecedented invasion of privacy. “Bad actors using smartphones can localize and track individuals in their home or office from outside walls, by leveraging reflections of ambient Wi-Fi transmissions,” they say.

    First some background. If humans were able to see the world as Wi-Fi does, it would seem a bizarre landscape. Doors and walls would be almost transparent, and almost every house and office would be illuminated from within by a bright light bulb—a Wi-Fi transmitter.

    But despite the widespread transparency, this world would be hard to make sense of. That’s because walls, doors, furniture, and so on all reflect and bend this light as well as transmitting it. So any image would be impossibly smeared with confusing reflections.

    But this needn’t be an issue if all you are interested in is the movement of people. Humans also reflect and distort this Wi-Fi light. The distortion, and the way it moves, would be clearly visible through Wi-Fi eyes, even though the other details would be smeared. This crazy Wi-Fi vision would clearly reveal whether anybody was behind a wall and, if so, whether the person was moving.

    That’s the basis of Zhu and co’s Wi-Fi-based peeping tom. It looks for changes in an ordinary Wi-Fi signal that reveal the presence of humans.

    The challenge is actually even harder than described, because Wi-Fi sniffers don’t produce an image at all. The data that Zhu and co use is just a measurement of the signal strength at a specific location. That doesn’t tell you anything about the location of the transmitter. And without knowing that, it’s impossible to say where any human that distorts the field would be.

    So the first step in the researchers’ approach is to locate the Wi-Fi transmitter. They do this by measuring the change in the signal strength as they walk around outside the target building or room. Indeed, they have created an app that uses the smartphone’s built-in accelerometers to record this movement and then analyzes the change in signal strength as they move. In that way, it is possible to number-crunch the position of the transmitter, even in the presence of numerous reflections and distortions.

    It is even possible to work out exactly where the transmitter sits inside a house, because floor plans of most homes and offices in the US are downloadable from places such as real estate websites.

    The researchers say that by walking back and forth a few times outside a room or building, they can reliably locate the transmitter. “We found that consistency check across 4 rounds of measurements is sufficient to achieve room level localization of 92.6% accuracy on average,” they say.

    Having done that, it’s just a question of waiting. Provided nothing moves inside the target building, the Wi-Fi signal will be constant. But any small movement changes the signal in a way that is straightforward to measure.

    Zhu and co show how various movements change the signal in different ways. For example, opening a door changes the field in two adjacent rooms and thus is straightforward to spot. Walking around creates large distortions, and even an action like typing creates small changes that a smartphone Wi-Fi receiver can pick up.

    The team go on to say that they have tested this approach using Nexus 5 and Nexus 6 Android smartphones to peer into 11 different offices and apartments that the team had permission to observe, many of which contained several Wi-Fi transmitters.

    Additional transmitters improve the accuracy of the approach. “We see that with more than 2 Wi-Fi devices in a regular room, our attack can detect more than 99% of the user presence and movement in each room we have tested,” say the researchers.

    It’s not hard to imagine how a malicious actor might use this to work out if a building was occupied or empty.

    The team say there are various defenses against this type of attack, such as geofencing Wi-Fi signals, but these are difficult to implement and have limited effectiveness. The most promising form of defense seems to be adding noise to the signals; the researchers are hoping to develop this in more detail in future.

    In the meantime, this work suggests that the mere presence of Wi-Fi signals is a significant risk to privacy. “While greatly improving our everyday life, [wireless transmissions] also unknowingly reveal information about ourselves and our actions,” say Zhu and co. For the moment, this risk has been largely overlooked. That will need to change quickly.

    'We endorse the idea of voluntarism; self-responsibility: Family, friends, and churches to solve problems, rather than saying that some monolithic government is going to make you take care of yourself and be a better person. It's a preposterous notion: It never worked, it never will. The government can't make you a better person; it can't make you follow good habits.' - Ron Paul 1988

    Awareness is the Root of Liberation Revolution is Action upon Revelation

    'Resistance and Disobedience in Economic Activity is the Most Moral Human Action Possible' - SEK3

    Flectere si nequeo superos, Acheronta movebo.

    ...the familiar ritual of institutional self-absolution...
    ...for protecting them, by mock trial, from punishment...

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  3. #2
    Get a big dog. Problem solved.

    Seriously, though... We need to start considering security measures to ensure your privacy. Technology keeps getting better and better. Which means your anti-virus software needs to adapt. Where there are problems, there are opportunities.
    "And now that the legislators and do-gooders have so futilely inflicted so many systems upon society, may they finally end where they should have begun: May they reject all systems, and try liberty; for liberty is an acknowledgment of faith in God and His works." - Bastiat

    "It is difficult to free fools from the chains they revere." - Voltaire

  4. #3
    Anyone that can see inside my home is freeloading and needs a list of outdoor chores .
    Do something Danke

  5. #4
    Wow this is actually kind of old.

    This college project video is under very controlled conditions, so I'm not sure if a snoopy neighbor hacker wannabe or theif could accomplish spying in this level of detail. Probably just enough to tell if there is movement or the radio silhouette of anyone near the walls.

    I wonder if there is a way to spoof this if people are concerned like a kind of radio mirror so that the intruder sees motion which is coming from themselves, but they get spooked.

  6. #5
    That's it, we're going OFF the grid.

  7. #6
    Secrecy - Hide Wrongdoings
    Privacy - Hide Moral Behaviors from those without Morals

    The difference between Right and Wrong is SUBJECTIVE. There are huge influences on your own Subjectivity depending on what ever Group you are currently associating with. Each of those Groups want to take something from you to benefit themselves, not you. Ending your Privacy is about forcing people to choose their assigned role of the group, which is to be a resource to be consumed. You will be judged on that which you do not hide, and take pride in, not that which is considered wrong. If you are a Christian, then you are in the wrong according to many other religious groups. If you are a Pepsi drinker, then you are in the wrong for not giving more money to Coca Cola. Eliminating your Privacy allows you to be easily Divided by every aspect of your life. You will be forced to defend yourself as an individual against those who have different conclusions than you do. You will spend your time defending yourself instead of looking up at the Architects of your Destruction, while you may occasionally pause and wonder "how did things get so bad"? It was by design, and all that was needed was for you to start sharing the intimate details about yourself that you would only share with your closest friends and family, but never your bosses.

    Ending your Privacy ends your Resistance to your Assigned Group Role. You are expected to end up stupid, confused, manipulated, utterly brainwashed, distracted, belittled, fined, imprisoned, broken, dependent, and completely controllable by your Slave Masters. Psychology is the idea that human behavior is predictable, and you are enabling those who do not have your best interests in mind have full access to predict if you ever intend on resisting your Overlords. Ending your Privacy is your PANOPTICON, where your behavior is manipulated and modified to service the Elite. You are given no choice but to give up Privacy to your Elite Overlords so they may micromanage every aspect of who you are, down to measuring within centimeters of accuracy. You are letting them tell you who to be, what your limits and goals are, and not a single thing will EVER be done to actually benefit you, EVER.

    To control large groups of people, the controllers need to be able to predict the actions and reactions of the populous as a whole. Controllers need three things to fully modify every behavior: Belief, Money, and Violence. Belief is probably the most powerful but most subtle. Belief isnt about religion but every aspect of your mind, who and what you are at your very core, if you resist oppression or you embrace it, and having the most detailed psych profile about you enables the people at the very tippy top to bypass your psychological defense mechanisms and force you to embrace your assigned role, or face rejection by a society of sheep. Money and Violence are covered elsewhere, but are also there to regulate your behavior should you become unruly. Privacy is your defense against all the manipulations of your entire mind. Privacy = Self Defined Natural Belief, your only defense against their system of control in Belief, Money, Violence.
    1776 > 1984

    The FAILURE of the United States Government to operate and maintain an
    Honest Money System , which frees the ordinary man from the clutches of the money manipulators, is the single largest contributing factor to the World's current Economic Crisis.

    The Elimination of Privacy is the Architecture of Genocide

    Belief, Money, and Violence are the three ways all people are controlled

    Quote Originally Posted by Zippyjuan View Post
    Our central bank is not privately owned.

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