Marketplaces for SSL/TLS certificates have emerged on the Dark Web. The certificates are often paired with ancillary products, like Google-indexed aged domains, after-sale support, web design services and even integration with a range of payment processors. The research, from Venafi, the University of Surrey and the Evidence-based Cybersecurity Research Group at the Andrew Young School of Policy Studies at Georgia State University, was released at the RSA Conference 2019 in San Francisco.
Source: https://threatpost.com/tls-markets-fdark-web/142310/