Resilio Sync , keys (formerly known as "secrets") are alphanumeric strings used to identify shared folders, encrypt data, and find peers across a network. Each key's first letter designates its specific permission type and functionality within the mesh. Resilio Sync Core Key Types
: Allows devices to receive updates but prevents them from syncing their own changes back to the rest of the mesh. Prefix : Historically starts with B or E . resilio sync key