Encrypt outgoing data? (any mobile platform)

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Encrypt outgoing data? (any mobile platform)

Would it be possible for me to build an application that enables people to encrypt call coming to me with my public key and then for me to decrypt the call data at my end using my own private key. This way I basically have a more secure communication channel which I am assuming because RSA is hard to crack would be difficult to monitor.

I am asking this question from a research point of view and have absolutely not considered the factor as to how computationally feasible would such an application be. I would just like to know if there is a way for me to intercept my outgoing data using any built functions.

Thanks

PGP-phone has sourcecode available. You could try to be compatible with it, or just use it for inspiration.

Will 2010-09-13 11:37:00

hey thanks this looks pretty close. I will use it as reference, I was actually looking for a way for me to access the data stream which is sent out of my device at realtime. Would like a way to access that to start with.

traumatized 2010-09-13 11:42:09

+1 A:

technically it should be possible with something like sipdroid to use encryption though i have not tried it on my android phone.

https://guardianproject.info/tag/sipdroid/

warsong 2010-09-13 11:44:52

this looks like a place to start with! Thanks, but this seems to talk about only IP data traffic. I would like to create an application that takes my raw voice data encrypt that and then pass on that data to the phones outgoing call mechanism to do what it does best. So direct voice calls can be more secured!

traumatized 2010-09-13 11:48:12

GSM and CDMA are already encrypted.

Blrfl 2010-09-13 11:55:38

i do realise that's what you were asking first time around, tbh i think that would be impractical as it would depend on whoever calls you to have the your public key. sipdroid encrypting calls would probably be the closest you will get for now. i could be wrong but what you suggest sounds a bit far-fetched. best of luck though :) if there has ever been a time when this kind of thing is possible with the openness of Android, it is now.

warsong 2010-09-13 11:55:52

@Blrfl Since its not done by me, don't really trust it. If the idea were anymore ridiculous I would probably be tagged a conspiracy theorist. :)

traumatized 2010-09-13 12:13:50

@warsong I was worried people might might misinterpret what I am asking coz what I am asking is pretty ridiculous and infeasible. But then its just research interest, and you never know. :)

traumatized 2010-09-13 12:14:44

warsong 2010-09-13 12:18:09

@warsong I am aware of that and the govt can routinely snoop in on your telephone conversation too. By encrypting and decrypting at the source and destination we can probably beat any snooping mechanism and prevent in the middle attack. Look at blackberry service facing so much flak from all the governments about security. If only we as the user decide to secure our communication, will we not be safer?

traumatized 2010-09-13 12:25:46

i agree, just saying it would be impractical the way you're describing. its a good idea, but that's not the way to implement. i think there must be a better way.

warsong 2010-09-13 14:07:16

@traumatized I understand where you're coming from. Hooks to insert your own crypto on the air side of the audio CODEC would be ideal, but it isn't something Joe Mobile Phone Owner cares about, carriers want to support or governments want to encourage. If you want to experiment with encrypting calls, VoIP is the platform to do it. The mobile networks and handsets aren't really designed to do what you want, and most commercial solutions use IP for transit instead of placing voice calls.

Blrfl 2010-09-13 23:42:37

@Blrfl thanks for you inputs. As I said earlier it might be a 'fools errand' but I would still like to try it. :)

traumatized 2010-09-14 04:13:28

ansaurus

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Encrypt outgoing data? (any mobile platform)

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