Subject Synchronize FB databases


I have a challenge and thought to post it here since maybe JayBird can help with a solution.
What I want to do is to synchronize Firebird databases across the internet.
The transmission of the synchronization data is out of the scope of the question. I will probably use webservice or websocket to send the data.
I already have a mechanism for NBAK backups over the internet, which is not the solution since the data needs to be synchronized on the fly.
I cannot install any replication software since our software is installed on many place and it would be a nightmare to maintain.

Is it maybe possible for JayBird to create some kind of "delta" data with the changes which I pick up and send and execute on the remote database?

Maybe somebody has another solution?
Any advice is highly appreciated.

Hugo Larson