I have a question for the devs:

I'm trying to understand the potential security vulnerabilities of Electrum. I have read every resource I can find online, but I can't find a reference to one of my biggest questions:

1. Is the electrum.dat file vulnerable?
2. Does a user need to protect access to this file with the same degree of care as the bitcoin-QT's wallet.dat?
3. If an attacker were to access electrum.dat, would the attacker be able to transfer funds and impersonate the victim?

Thanks.