You are the security administrator for your organization. You are evaluating risks for various assets stored on the network. One asset, a collection of Request for Comments (RFC) documents that was downloaded from an Internet source, is threatened by a new Trojan horse program that locates and deletes text documents. Your system is vulnerable to this Trojan horse since no other detection systems are deployed on your network, other than a simple antivirus software product. Why can you ignore this specific risk?