[asjdflakjsdf]

And what if some engineer at github changes the original one to say that all my money has been sent to his account?

[endisneigh]

that's not really possible - presumably if someone were implementing what I was describing they'd have it so all transactions are signed by the participants. they wouldn't have the private key(s) so, well, it's impossible.

[asjdflakjsdf]

Its very possible. They could change it on their side, rewrite the history, and claim I never owned anything. I have no defence in that case