By default, when you share keys with someone, RetroShare lets you connect, but the keys are unsigned and "marginally" trusted.
From this thread
and prior knowledge, I understand that signing is stating "Yes, I know this person", but I don't exactly understand the implications within RetroShare.
Trust is something I only vaguely understand. My understanding is that if I mark FriendA as Full Trusted, then FriendA can somehow automatically pass friends to me so that I don't have to manually make them friends. Is this correct? How does this happen? I still have no idea what happens if I mark someone as Trust: None or as Trust: Marginal.
Someone please explain it to me like I'm 5. What do the different levels of trust mean and how does signing factor in? If I fully trust a friend, will I automatically be friends with all their friends? With all friends whose keys they sign?