FLARM-IGC flight recorders - security update and revised IGC-approval

A significant update to the GPS Flight Recorder function of FLARM-IGC 
units is now available.  Owners are advised to incorporate this as soon 
as possible.  It is available through a web download, see below.

FLARM-IGC owners may recall that in 2012, software appeared on the web 
from an unknown source that enabled false Flarm-IGC files to be produced 
that passed the IGC electronic validation check.  To counter this, a 
security update to Firmware Version 5.8 is now available via:

www.flarm.com/support/updates/index_en.html

and click on "flarm_508fw" on the right hand side of the page to 
download this file.  This file will update a FLARM-IGC unit to Firmware 
5.08 standard using the standard FLARM update procedure (via a micro-SD 
card or a PC-based update).  Note that an update to the Flarmtool 
utilities program incorporating V5.08 is also available by clicking 
"Installation V5.08" on the right hand side of the same web page.

** Important Note ** Owners should note that the IGC-approval for 
earlier versions of Firmware (from V4.0 to V5.6) will be withdrawn on 30 
April 2013.  This is to ensure that the possibility of false IGC files 
being produced using the malicious software referred to above, is 
eliminated.

A revised IGC-approval document is available on the IGC and GFAC web 
pages:

www.ukiws.demon.co.uk/GFAC/approvals/flarm-igc.pdf

or

www.fai.org/gnss-recording-devices/igc-approved-flight-recorders

For electronic validation of IGC files produced with V5.8 firmware, use 
either the latest Flarmtool program (see above) or the free IGC Shell 
program together with the latest Flarm DLL file which is named 
IGC-FLA2.DLL to differentiate it from the earlier file IGC-FLA.DLL.

For the IGC Shell program and DLL files, including the new IGC-FLA2.DLL, 
see:

www.ukiws.demon.co.uk/GFAC/downloads.htm
or
www.fai.org/gnss-recording-devices/free-software

The above may seem complex, but Flarm owners are used to making regular 
updates that in the past have been to optimise the Flarm Traffic 
Avoidance and warning system.  The difference with this update is that 
it increases the electronic security both of the Flight Recorder 
facility and of future downloaded IGC files.

In view of the important of this security update, please give this 
announcement publicity so that current owners and users of FLARM-IGC 
units are aware of it, and its implications.  The Flarm company are 
doing likewise through their normal channels of communication to Flarm 
owners, gliding software producers and OLC organisers.

-- 
Ian Strachan
Chairman IGC GFA Committee



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