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BitTorrent Sync can synchronize files between devices on a local network or emote devices over the Internet via secure, distributed P2P technology.
BitTorrent Sync synchronizes files using peer-to-peer (P2P) technology. The user’s data is stored on the user’s local device instead of in a 'cloud’, therefore requiring at least two user devices, or “nodes,” to be online in order to synchronize files between them. BitTorrent Sync encrypts data with an Advanced Encryption Standard AES-128 key in counter mode which may either be randomly generated or set by the user. This key is derived from a ‘secret’ which can be shared to other users to share data. Data is sent between devices directly unless the target device is unreachable (e.g. behind a firewall), in which case the data will first be relayed via an intermediary node. Many devices can be connected simultaneously and files shared between them in a mesh networking topology.
There is no limit on the amount of data that can be synced, other than the available free space on each device.