Mobile Phone encryption with java

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frankgerlach@gmail.com - 17 Feb 2006 03:04 GMT

Hello everybody,
I would like to turn my mobile phone (Nokia 6030) into a secure
communications system (ie. nobody, including governments should be able
to decrypt the voice/text messages). I quickly looked at the MIDP and
CLDC spec, but could not find a way to access the microphone. Is it
possible to do so at all ? Also, I wonder how to transfer data from one
mobile to another. Should I use MMS or TCP ? What is the API for this ?
( I assume it is the Connector class...) Maybe someone already did all
the things I described, so any pointers to such a system would also be
appreciated (also OK, if it is Symbian code)

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tom fredriksen - 17 Feb 2006 10:49 GMT

> Hello everybody,
> I would like to turn my mobile phone (Nokia 6030) into a secure
[quoted text clipped - 6 lines]
> the things I described, so any pointers to such a system would also be
> appreciated (also OK, if it is Symbian code)

I dont think you can access the microphone and speaker for those
purposes, that is not the point of midp. Normally, this is done by
specialised mobile phones containing electronics specifically built on
the request of the goverment or military (that is at least the case with
the gsm phones the goverment in norway is using.)

Another thing is, are you thinking something on the line of using the
mobile as a sort of modem between the two mobiles, or are talking about
using the internet for this. The first I dont know how to do, but it
would be modem communication so it might be feasible. If its internet
wise, and not a 3G network (UMTS in europe), then it is probably going
to be quite expensive to use (in norway: about $12 per MB). If its 3g
then its like adsl and cheap, then you should look at voip over a mobile
phone using SIP and link encryption.

/tom

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Darryl L. Pierce - 17 Feb 2006 15:23 GMT

> I would like to turn my mobile phone (Nokia 6030) into a secure
> communications system (ie. nobody, including governments should be able
> to decrypt the voice/text messages). I quickly looked at the MIDP and
> CLDC spec, but could not find a way to access the microphone.
> possible to do so at all ?

Not to my knowledge. The MIDP doesn't seek to provide phone-specific
functionality like that since it's designed for more than just mobiles.
Nokia may provide proprietary APIs, but I don't believe they do.

> Also, I wonder how to transfer data from one
> mobile to another. Should I use MMS or TCP ? What is the API for this ?

Take a look at the javax.microedition.io.Connector framework.

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Darryl L. Pierce <mcpierce@gmail.com>
Homepage: http://mcpierce.multiply.com/
"McVeigh's lawyer got him the death penalty, which, quite frankly,
I could have done." - Jon Stewart

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Mobile Phone encryption with java

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