Answer: B. People can invade your Internet privacy even if you code your information.
Explanation:
The central idea of the passage is that "People can invade your Internet privacy even if you code your information".
This can be deduced when it was written that even if Alice uses her private key to decrypt a message, the virus that was designed by Eve would wake up and make a note of it.
Also, the Trojan horse, appears to act like a genuine encryption product, but which actually betrays the user as well.
