See this: https://github.com/TokTok/c-toxcore/issues/426 https://github.com/TokTok/c-toxcore/issues/426 Long story short: if someone obtains your Tox private k

See this: https://github.com/TokTok/c-toxcore/issues/426 https://github.com/TokTok/c-toxcore/issues/426 Long story short: if someone obtains your Tox private key, they are able to impersonate you in the conversations with other people without you realizing it. Tox developers admitted this was an issue. Fixing this means changing the protocol itself (which will affect everyone). Tox is still experimental (which they admit here: https://github.com/TokTok/c-toxcore/issues/426 https://github.com/TokTok/c-toxcore/issues/426) and it is not advisable to use it.