Access control is a method of guaranteeing that users are who they say they are and that they have the appropriate access to company data. Without authentication and authorization, there is no data security, expert says. The collection and selling of access descriptors on the dark web is a growing problem. Cybercriminals will increase their use of access marketplaces and access mining because they can be “highly lucrative” for them. Access control requires the enforcement of persistent policies in a “world without traditional borders,” CEO Avi Chesla says.”]