Gary Van Ryswyk, of Sebring, was detained by officers from the Highlands County Sheriff's Office on Monday and charged with practicing medicine without a license resulting in bodily injury.
Dark web markets are now "being picked off one by one," according to a top cybersecurity expert.
The man was allegedly caught posting an advert seeking a girl to facilitate his necrophilia and cannibal fantasies.
On the dark web, Paul Christian Stellato was known under the pseudonym "cocaineking247."
The boy's mother was given a 12-and-a-half year sentence for the abuse.
"If successful, a decentralized prediction market would be a benefit for society," one expert told Newsweek.
Using crypto-currency and an underground network of nearly-untraceable websites, people get what they need.
The blockchain is a distributed public ledger of cryptocurrency transactions.
A database of 1.4 billion user passwords compiled from 252 data breaches is suspected to be the largest ever.
Criminals are migrating to the dark web on a massive scale, Europol warns.
It is not clear why websites including the popular Dream Market suddenly disappeared.
Manhattan federal prosecutors have seized $48 million from Robert Ulbricht, Silk Road creator.
"He got his son, Philip Luciano, involved," states a federal court complaint. "Philip was the one who knew how to use the dark web: Philip set up their account on the dark web and handled the transactions."
The records come from at least nine states, and the seller claims to have more.
A bitcoin wallet attached to the site has already received donations worth more than $87,000.
Illicit drug transactions on the dark web have increased significantly since 2013.
Twitter suspends accounts in response to user account details appearing on the dark web.
Mozilla says the Firefox vulnerability, which the FBI won't disclose, leaves millions of its users vulnerable.
Drastic security measures could affect French public Wi-Fi as early as January 2016.
Inside the Web's secret space for drug dealers, arms traffickers, hackers and political dissidents