So i wondered how secure it is to verify the ownership of an account by signing a message with an old posted bitcoin address. Now i thought that, when you edit a post, the post will have a short line under the post that states "This post was edited on... something". But nothing like that happens.
So this sounds like a serious problem to me. If we want to be signatures worth something then we would need such a "edited-info".
Do you mean a sort of Log? It would be good idea.
Otherwise a hacker could go, edit an old post that wasnt quoted in the thread, and insert a bitcoin address he owns. Voila, he is the legit owner since ages.
So am i overlooking something or that really a risk? If so i would want to ask for enabling this notice.
If the 'hacker' edits an old post ... it will not be a problem (due the short line under the post - the notify edit). So it should not be considered as valid proof.