Steve,
Your observation is true, and yamaha is certainly aware of it. Let me try to alleviate some of your primary fears though...
While others may try to connect to your piano's access point, it has no access to the rest of the computers on your network, nor to the internet. Those capabilities of the piano are actually on a different (wired) network (the one that your airport is connected to).
That being said, there are real dangers to having the communication between the remote(s) and the piano be wide open. Even more so if your piano is running a version of the software before 2.1. Most of those dangers, however, are to the piano's database, and nothing else. A truly malicious person with a whole lot of time on their hands could tell your piano to delete everything it has, for example... That's the worst case scenario as far as I can see. They could also tell your piano to connected to yamaha's store and purchase a bunch of music for you...however they would need your password and fortunately *THAT* is encrypted (again, assuming version 2.1 or greater).
-Kevin
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From: qv308 <stevme@...>
To: disklavier@yahoogroups.com
Sent: Monday, October 27, 2008 9:59:09 AM
Subject: [disklavier] Lack of security for DKV network
I live in an apartment building, and there must be a dozen or so wifi
users here. Most all of us with existing wifi networks, I use the
Apple Airport system, provide them with password protection to
prevent unauthorized use. When I had my MRK IV up and running I was
disturbed to find my DKV listed among other networks in the building,
AND NO SECURITY PROTECTION.
Is there some way to provide security protection so that others will
not mess with the DKV or attempt to use it for access to my other
computers or to the internet?
Is Yamaha aware of this security flaw?
Steve