This isn't a "backdoor" inside the brain. (It's more equivalent to, say, gaining read access to /etc/shadow and being able to brute-force the passwords inside.)

This isn't a "backdoor" inside the brain. (It's more equivalent to, say, gaining read access to /etc/shadow and being able to brute-force the passwords inside.) That quibble aside, this is an interesting article on a rather disturbing potential future attack vector.