Sorry for Bumping up the old thread. I was here because I didn't have any idea about how this works. I have learned how to sign a message from my own wallet.
I have found that Blocktrail has announced their service ended in 2019, But, This thread wasn't updated. The thread creator is not active for a long time now. Since this thread is very useful for newbies (Even for some hybrid Sr. members like me

), I think I am doing right by Bumping up this thread.
