Re: [FSO/SHR/debian] SMS location app
On Thu, 25 Dec 2008 11:56:49 pm William Kenworthy wrote: > encryption has overhead - more than a 160 characters allows without > tricks. A very good point against public key crypto in this situation. :-( > and why bother? - if the trigger is a random code known only to you, > whats the problem? It's just that the trigger of "sentry:location" in this application doesn't seem that random; it should perhaps be a configuration option that has to be customised before the application will run (i.e. the default setting should cause the program to abort rather than betray your location). cheers, Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC This email may come with a PGP signature as a file. Do not panic. For more info see: http://en.wikipedia.org/wiki/OpenPGP signature.asc Description: This is a digitally signed message part. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [FSO/SHR/debian] SMS location app
On Thu, Dec 25, 2008 at 9:11 AM, Florian Hackenberger wrote: > On Thursday 25 December 2008, William Kenworthy wrote: >> encryption has overhead - more than a 160 characters allows without >> tricks. > Sure it has overhead. This makes it useless for text messages. Control > messages however can be very short. I tried it with the string 'loc' (3 > bytes/chars) and the gpg signature is 99 bytes long. That sums up to > 102 bytes and fits easily into a 160char SMS. > > Cheers, >Florian > Some kind of authentication is on the todo list. What I was also thinking were a few other commands such as a lost mode where it will only display contact information for the owner. A tracking mode where it might send location every x minutes. I'd also like to add different return messages via smtp. Angus ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [FSO/SHR/debian] SMS location app
On Thursday 25 December 2008, William Kenworthy wrote: > encryption has overhead - more than a 160 characters allows without > tricks. Sure it has overhead. This makes it useless for text messages. Control messages however can be very short. I tried it with the string 'loc' (3 bytes/chars) and the gpg signature is 99 bytes long. That sums up to 102 bytes and fits easily into a 160char SMS. Cheers, Florian -- DI Florian Hackenberger flor...@hackenberger.at www.hackenberger.at ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [FSO/SHR/debian] SMS location app
I think this was discussed a few weeks back: encryption has overhead - more than a 160 characters allows without tricks. and why bother? - if the trigger is a random code known only to you, whats the problem? BillK On Thu, 2008-12-25 at 23:31 +1100, Chris Samuel wrote: > On Thu, 25 Dec 2008 4:33:13 pm Angus Ainslie wrote: > > > It watches for specially formatted SMSs and when it sees the right one it > > SMSs back its location. > > Cool, I was talking this idea over with friends a few weeks ago so it's great > to see someone having the same idea who can actually programme. ;-) > > Can I suggest that authenticating messages with OpenPGP signed (optionally > encrypted too) messages might be a good idea ? > > That way you know that not just anyone can find out where you are when they > wish.. > > ___ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community -- William Kenworthy Home in Perth! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [FSO/SHR/debian] SMS location app
On Thu, 25 Dec 2008 4:33:13 pm Angus Ainslie wrote: > It watches for specially formatted SMSs and when it sees the right one it > SMSs back its location. Cool, I was talking this idea over with friends a few weeks ago so it's great to see someone having the same idea who can actually programme. ;-) Can I suggest that authenticating messages with OpenPGP signed (optionally encrypted too) messages might be a good idea ? That way you know that not just anyone can find out where you are when they wish.. -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC This email may come with a PGP signature as a file. Do not panic. For more info see: http://en.wikipedia.org/wiki/OpenPGP signature.asc Description: This is a digitally signed message part. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [FSO/SHR/debian] SMS location app
Nice! And another tool which can be used in http://wiki.openmoko.org/wiki/Anti-Theft_Mode Angus Ainslie wrote: > I've started an app to help find lost or borrowed Freerunners. It > watches for specially formatted SMSs and when it sees the right one it > SMSs back its location. > > Put [1] in /usr/bin/ > Put [2] int /etc/init.d/ > > chmod +x /etc/init.d/sms-sentry.sh > ln -s /etc/init.d/sms-sentry /etc/rc5.d/S99sms-sentry > reboot > > Now whenever you text "sentry:location" to your Freerunner it will > return its lat and lan ( and altitude if available ). It may take > minutes for the return SMS if the GPS is not active when the incoming > SMS arrives. > > [1] http://handheldshell.com/sms-sentry > [2] http://handheldshell.com/sms-sentry.sh > ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [FSO/SHR/debian] SMS location app
2008/12/25 Angus Ainslie > I've started an app to help find lost or borrowed Freerunners. It > watches for specially formatted SMSs and when it sees the right one it > SMSs back its location. > > Put [1] in /usr/bin/ > Put [2] int /etc/init.d/ > > chmod +x /etc/init.d/sms-sentry.sh > ln -s /etc/init.d/sms-sentry /etc/rc5.d/S99sms-sentry > reboot > > Now whenever you text "sentry:location" to your Freerunner it will > return its lat and lan ( and altitude if available ). It may take > minutes for the return SMS if the GPS is not active when the incoming > SMS arrives. It would be useful to have some authentication too. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [FSO/SHR/debian] SMS location app
On Dec 25, 2008, at 12:33 AM, Angus Ainslie wrote: I've started an app to help find lost or borrowed Freerunners. It watches for specially formatted SMSs and when it sees the right one it SMSs back its location. Now this is just brilliant! Good work, and thank you. (d) --- Damian A. Spriggs Writer: Weekly World Shrew http://www.weeklyworldshrew.com ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
[FSO/SHR/debian] SMS location app
I've started an app to help find lost or borrowed Freerunners. It watches for specially formatted SMSs and when it sees the right one it SMSs back its location. Put [1] in /usr/bin/ Put [2] int /etc/init.d/ chmod +x /etc/init.d/sms-sentry.sh ln -s /etc/init.d/sms-sentry /etc/rc5.d/S99sms-sentry reboot Now whenever you text "sentry:location" to your Freerunner it will return its lat and lan ( and altitude if available ). It may take minutes for the return SMS if the GPS is not active when the incoming SMS arrives. [1] http://handheldshell.com/sms-sentry [2] http://handheldshell.com/sms-sentry.sh -- Angus Ainslie http://www.handheldshell.com/ ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
