1. A system for securing a host computing device, comprising: a first component that: receives a stream, the stream containing a security policy; and for each of a set of one or more security engines, prepares a portion of the security policy relating to at least one security engine of the set; and communicates the prepared portion of the security policy to the at least one security engine of the set; and one of the security engines of the set that, when none of the security engines indicates a failure after receiving the prepared portion of the security policy, enforces the portion of the security policy it received.