CmdrTaco from the good-luck-with-that dept.
olsmeister writes "A Bitcoin user allegedly has had $500,000 worth of Bitcoins stolen from him. A hacker supposedly gained access to the user's home computer and managed to get the user's wallet.dat file, which contained the cryptographic keys that allowed him to drain the user's balance."
It is masked but always present.
I don't know who built to it.
It came before the first kernel.