The dark web refers to web pages that are not indexed by commonly used search engines. Under the cloak of anonymity, cybercriminals and threat actors can operate, selling an array of tools and services that can be used to wreak havoc on organizations.While major takedowns have disrupted parts of the dark web, it remains resilient, with new technologies and changing criminal strategies. For CISOs, one of the biggest shifts in thinking is that the dark web is no longer just a post-breach problem.