https://blog.savoirfairelinux.com/en-ca/2017/rings-stable-version-released/
About Ring
Ring is a fully distributed system based on OpenDHT technology and Ethereum Blockchain. It means, it does not need any central authority, an enterprise or even a server to function. Therefore, it avoids keeping centralized registries of users and storing their personal data. In addition, Ring is based on standard security protocols and end-to-end encryption. Therefore, it prevents decryption of communications over the network and consequently offering a high level of privacy and confidentiality