Founded in 2017, Sentinel is a decentralized infrastructure providing bandwidth for virtual private network (VPN) connections. A VPN connection is a secure tunnel which prevents Internet traffic from being monitored and/or blocked by service providers, governments, or malicious actors. Traditionally operated by a single entity, Sentinel enables the concept of decentralized VPNs via its network of endpoints around the world, all of whom may contribute bandwidth to users' private connections. Serving as the infrastructure for "dVPN" applications, developers may leverage Sentinel to create new VPN services with enhanced anonymity and censorship-resistance. Sentinel is a blockchain based on the Cosmos SDK using the Tendermint BFT consensus mechanism, with the native token $DVPN.