I was reading following article and I come up to know about RF(Radio frequency) signals are the medium of communication between connect mobile phone calls.
Idea came in my mind to have android app kind of RF scanner which secretly eavesdrop on mobile phone conversations around you.
I know i need more research but i quickly want to know if it is possible with android apps or not ?
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Android does not offer APIs to do this. They are buried in radio kernel, which comes from pphone vendor. So answer is negative. It is possible but not with android.
PS: COTS solutions doing this are usually restricted in export and pretty expensive.
Honestly I don't see why this would be impossible. The pitfall of building an app like this would be:
a. user will most likely need a rooted phone and some kind of custom radio with their kernel. This shouldn't be a huge issue though as most users looking for something like this should have the know how to root their phone.
b. you wouldn't be able to release this on the market. as soon as google caught wind of such a malicious app they would remove it immediately.
Catching the signal of other conversation is not enough, cause signal is at least encrypted!
Related
The covid-19 app is capable of detecting who came into contact with who, how do they do it? I am trying to make something similar but I am unsure how they managed to get that information from the phones. I don't need the information to be private (like phone number), it could be something that only the government can make use of (like sim card number or MAC address. Is that possible?
I looked into Google Nearby and Wifi Direct... But as far as I understand it, it requires a handshake (covid19 app doesn't). I also looked into potentially making your phone into a hotspot and capturing wifi requests but I am not sure which library / API lets me do that.
Does anyone have know how this is done? I can't find a concrete answer anywhere, this seems to be actually impossible until I realized that the covid-19 app is doing it.
As Morrison Chang and ArtHare have commented already, Google and Apple have implemented this on an OS level:
In the coming months, Apple and Google will work to enable a broader Bluetooth-based contact tracing platform by building this functionality into the underlying platforms. (source)
If you want the specs they're using, Apple and Google have pages on how contact tracing is implemented, but it would be hard (if not impossible) for an app to implement this.
So, what I want is just to scan the environment and see if any packages are sent without pairing or connecting to a device. Just a general scan of bluetooth in the air and being able to see some of what comes up, like packages exchanged and maybe some information of them. Everything I've read so far is about pairing or connecting first.
Thanks in advance!
The question is old, but since nobody gave an answer I try to fill the gap.
Bluetooth is, because of its technical specifications (frequency hopping etc.), difficult to sniff. A monitor mode like in WiFi doesn't exist out of the box. You would need to scan all Bluetooth channels at the same time. And then there is the challenge that since you managed to detect something, you need to know the next hop (to which channel the devices jump next). There are commercial hardware that can do that. Also some open source projects come up like Ubertooth, but with less capabilities.
You could try to purchase an Ubertooth and play with it.
I am very unhappy with my Fossil Q hybrid watch (no screen, tracks activity & sleep and button functions) but honestly it looks good. The app keeps crashing though. I would like to make my own Android app to extract all kinds of data (for future analysis). Before investing a lot of time, I tried to do some research on how to access the watch. It operates obviously on BLE. But all the documentation is either about Wear OS or actual smartwatches with more advanced functionality. Search engines fail to distinguish between what I am looking for and most popular results.
I was wondering, if there are any known communication protocols between apps and smartwatches, where I can start experimenting?
BTW, HCI snoop log reports all traffic but it doesn't look like anything to me. But I can also try to hack it (if it is not encrypted...).
I remember that I have found once a info on dev site regarding the heart rate tracking but I cant find it.
Anyway I have found one thing that might help you:
https://developers.google.com/fit/android/ble-sensors
Unfortunately this is "fit" reference site, which data might be obsolete,
afaik the regular updates might come to API reference:
https://developers.google.com/android/reference/com/google/android/gms/fitness/SensorsApi
You can start by reading code and documentation of the GadgetBridge project: https://codeberg.org/Freeyourgadget/Gadgetbridge/
They support some of the "Q Hybrid" watches to some extent
I am wondering is it possible to do all these on an Android phone? Example, Samsung Galaxy S phone
To automatically launch a video clip upon phone start up i.e. from off position or phone ‘reboot’/’restart’
To run the video clip while the phone is idling
To launch to a particular wap site when interrupted
To restrict user from going to other portal other than the 3 steps above
To restrict user from running other application on the phone.
1) Yes but it may be hard to completely replace the phone's own screens and animation effects thus giving the smooth experience I think you're looking for. It's also pretty user-hostile.
2) What is 'idling'? If you mean standby, absolutely not. You'd kill the battery in 20 minutes in any case.
3) You can launch a website when the phone comes out of standby but it would be really annoying for the user. As for WAP .. I have no idea if you can view WAP on Android. Probably someone has made a viewer. I wasn't aware WAP was being used by anyone since some time around 2008.
4) Not without making your own custom build of Android and flashing it (very difficult technically). Sounds pretty evil for the user.
5) Again, not without making your own custom build of Android. You're reducing the phone to a brick pretty much with this stuff.
Yes, though it is user-hostile.
I have no idea what you are talking about.
I have no idea what you are talking about.
No, except by making your own firmware. Even by replacing the home screen, the user can boot into the Android equivalent of "safe mode" and bypass a replacement home screen app. You would need to have your home screen be the only one on the device, and your apps be the only one on the device.
See #4.
I will add only to question (1), since all the questions have been already answered. If you talk about replacing the standard boot and shutdown animations, then yes, it is very possible and pretty much any custom ROM for the SGS will let you do that. It's just a matter of assembling the sequence of PNG files you want. There are two image flashes before the animation, one is built-in in the bootloader, the other is hardcoded on the kernel.
Examples: http://forum.xda-developers.com/showthread.php?t=869347
You can do all these things, however you will need to flash a custom image - I assume you want to customise in-house handsets for a specific project, rather than have this as a generic app - I can't imagine normal users installing this kind of lockdown, and it sounds similar to an approach I was looking at for a project needing cheap PDAs with GSM connectivity.
If that's the case, and volumes are low, you might be better off targeting developer handsets, which can be bought through a publisher account on Android Market. I think this limits you to 10 handsets.
Hope this helps,
Phil Lello
I want to reboot targeted phone by SMS. Is it possible? How can we implement this?
According to this Android Developers thread on Google Groups, third party applications don't have permission to reboot the device.
Your problem has two core parts. Can you reboot the phone programatically? Can you write a program to intercept incoming SMS? If you answered YES to both of your question, it is possible to do this.
I am not a Android developer but i think this should be quite possible.
take a look # Android SMS intercept without notification icon or WAP-PUSH messages and http://mobiforge.com/developing/story/sms-messaging-android
I think BroadcastReceiver is the one you are looking for.
I have no idea whether you can programatically reset the android phone using java... Someone else might answer you about that
EDIT: I guess according to the link Bill has posted, 3rd party applications are not permitted to do a reset
If you mean by having an app waiting for a specific text, then only on a rooted phone.
Ranhiru's link tells you how to get the text without it giving a text notification. If your phone isn't rooted, then programs don't have access to functions like that. If it's rooted, I can't say exactly how to do it, I haven't tried yet, but have a look for the source of apps like quickboot, a lot of them have it all publically available on code.google.com
For the record, it IS possible to intercept SMS messages on a stock Android phone - I've written a little app which pops up a Toast when I get a text rather than having to go in to the messages app.
It's NOT possible to perform a normal shutdown/reboot/??? without rooting the phone or being Google (at least, convinving the phone you're Google) but that would be a violation of the developer agreement.
In fact, you will find huge barriers in your way if you try to do anything to the OS or any other app - Which is usually a good thing