Tango-Charlie is made to be deployed on Cloudflare Worker (Cloudflare FaaS platform). Contrary to Tang which allow whoever can contact the server to decrypt data, Tango-Charlie require the public ip of the client to have not changed (or be in the same /64 for ipv6). To do so while being stateless, Tango-Charlie generate keys on the fly, based on client ip and a secret known only to the server.
/!\ This software make heavy use of cryptography, and has not been audited, use at your own risks.
Name was inspired by an old french song