CommunitiesSelf-organized communities such as a social network or political group. A darknet may be used to protect rights such as privacy.
CrimeIn some cases, a darknet is centered around illegal activity such as a marketplace for illegal items.
ResearchA network built on top of the internet that is used to pool computing power, resources and data for research.
Virtual Private NetworkIt is common for organizations to use a virtual private network to connect remote workers and company networks. This is seldom referred to as a darknet but has similar characteristics.
Information SecurityDarknets may be used to isolate a network for security reasons. For example, an overlay network could be used to integrate data between organizations.
An encrypted overlay network that typically uses internet infrastructure but requires specialized software and authorization to participate.