17. The computer-implemented method of claim 1 , further comprising determining whether the identified alien content is benign content or malicious content.
17. The computer-implemented method of claim 1 , further comprising determining whether the identified alien content is benign content or malicious content. 18. The computer-implemented method of claim 17 , wherein determining whether the identified alien content is benign content or malicious content comprises comparing the identified alien content to other alien content that has previously been identified as being benign content or malicious content.