Cybersecurity experts say annual revenues generated on the dark web from the sale of stolen financial accounts, personally identifiable information (PII), passwords, and other data valuable to criminals intent on committing fraud is in the $100-billion range and growing at 40% per year. The amount of stolen information for sale on the dark web, which is that part of the web with anonymous encrypted sites not available to mainstream search engines, is believed to be 5,000 times larger than all of the information on the public surface web—Amazon, eBay, Facebook, etc.—indexed by search engine...