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Can an app on one phone see what a different phone is linked to?


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Old 15-07-2016, 15:07
jsmith99
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There's a minor discussion in another thread, and a key point (to which nobody seems to have the answer) is whether an app on a phone can do the following :

Person A has phone A, which contains an app which A has loaded.

Person A tells person B a web address, and asks him to link to that address using his own phone (call it ... oh .. phone B).

B goes to the webpage, and it asks B to enter some information. B does so.

The claim is that the app on phone A can pick up the information which B has entered into the website.

The information entered would be 2N and 1A, possibly in an order set by the website.

Would this be feasible?

It's just occurred to me that phone A could merely listen to the beeps as the keys are pressed on phone B. In addition, the alpha character will be one of a set of four, each requiring a different number of presses of the numeric keys.
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Old 15-07-2016, 15:15
chrisjr
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It is perfectly possible to design a website that would allow one visitor to that site to see any data entered by any other visitor. It would not be the apps as such doing this but the way they access the website.

You could set it up such that you enter a specific user name and login to the website which then allows you to see whatever data has been entered by other visitors to the website.

In fact Digital Spy uses a very similar technique on this very website. You may have noticed that there is a forum to contact the mods where only you and the mods can see posts made there. You can't see anybody else's posts nor can anyone who is not a DS mod see your posts.
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Old 15-07-2016, 15:53
jsmith99
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Thanks, that's very interesting. So it would be a function of the website, and nothing to do with the app?

It seems there's an app advertised as a magic trick, performing as I described. Quite expensive, in my view - £19

https://itunes.apple.com/gb/app/racaan/id915053523?mt=8
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Old 16-07-2016, 13:49
tdenson
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There's a minor discussion in another thread, and a key point (to which nobody seems to have the answer) is whether an app on a phone can do the following :

Person A has phone A, which contains an app which A has loaded.

Person A tells person B a web address, and asks him to link to that address using his own phone (call it ... oh .. phone B).

B goes to the webpage, and it asks B to enter some information. B does so.

The claim is that the app on phone A can pick up the information which B has entered into the website.

The information entered would be 2N and 1A, possibly in an order set by the website.

Would this be feasible?

It's just occurred to me that phone A could merely listen to the beeps as the keys are pressed on phone B. In addition, the alpha character will be one of a set of four, each requiring a different number of presses of the numeric keys.
If I understand you correctly then, yes, no problem. I use a website www.padfly.com which is simply a public notepad. You suffix the URL with an alphanumeric string such as padlfy.com/mynote and then anyone can read what you type - including yourself on another machine, which is something I do a lot. Zero security of course, but still very useful.
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Old 16-07-2016, 14:19
jsmith99
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Thanks, tdenson. It could easily be something like that.

This was very much a side-issue to the thread concerned, so unless the FM who introduced it comes back, I won't bother raising it. Just nice to know for my own satisfaction.
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