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In the BitTorrent file distribution system, a torrent file or meta-info file is a computer file that contains metadata about files and folders to be distributed, and usually also a list of the network locations of trackers, which are computers that help participants in the system find each other and form efficient distribution groups called swarms. [1]
PDF 2.0 defines 256-bit AES encryption as the standard for PDF 2.0 files. The PDF Reference also defines ways that third parties can define their own encryption systems for PDF. PDF files may be digitally signed, to provide secure authentication; complete details on implementing digital signatures in PDF are provided in ISO 32000-2.
Torrents with multiple trackers can decrease the time it takes to download a file, but also have a few consequences: Poorly implemented [59] clients may contact multiple trackers, leading to more overhead-traffic. Torrents from closed trackers suddenly become downloadable by non-members, as they can connect to a seed via an open tracker.
Describes a peer to which the client refuses to send file pieces. A client chokes another client in several situations: . The second client is a seed, in which case it does not want any pieces (i.e., it is completely uninterested)
A letter in the sender's own handwriting is more personal than an e-mail and shows that the sender has taken the effort to write it. If required, small physical objects can be enclosed in the envelope with the letter. Letters are unable to transmit malware or other harmful files that can be transmitted by e-mail.
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Peer-to-peer file sharing is the distribution and sharing of digital media using peer-to-peer (P2P) networking technology. P2P file sharing allows users to access media files such as books, music, movies, and games using a P2P software program that searches for other connected computers on a P2P network to locate the desired content. [1]
A BitTorrent client enables a user to exchange data as a peer in one or more swarms. Because BitTorrent is a peer-to-peer communications protocol that does not need a server, the BitTorrent definition of client differs from the conventional meaning expressed in the client–server model. [1]