is a (digital) social network, which (by design) restricts direct communication to pairs of users who are friends, possesses many of the security properties (privacy, anonymity, deniability, resilience to denial-of-service attacks, etc.) that human sociaties implement organically in daily life. This is the only known decentralized network design that allows open membership while being robust against a long list of distributed network attacks. We call a digital system with such design an organic network and the security that it attains for its users — organic security. Organic networks are extremely desirable in the current Internet climate, however they are hard to realize because they lack long-distance calling. Tonika resolves just this issue.