In the BitTorrent P2P file distribution protocol (see Chapter 2), the seedbreaks the

Chapter 8, Problem P13

(choose chapter or problem)

In the BitTorrent P2P file distribution protocol (see Chapter 2), the seedbreaks the file into blocks, and the peers redistribute the blocks to each other.Without any protection, an attacker can easily wreak havoc in a torrent bymasquerading as a benevolent peer and sending bogus blocks to a small subsetof peers in the torrent. These unsuspecting peers then redistribute thebogus blocks to other peers, which in turn redistribute the bogus blocks toeven more peers. Thus, it is critical for BitTorrent to have a mechanism thatallows a peer to verify the integrity of a block, so that it doesnt redistributebogus blocks. Assume that when a peer joins a torrent, it initially gets a.torrent file from a fully trusted source. Describe a simple scheme thatallows peers to verify the integrity of blocks.