Hostage Byte Attack

A hostage byte attack is a form of extortion that can target decentralized storage networks, where users pay independent hosts to keep their files. In the attack, a dishonest host stores a file but, when the user tries to download it, holds back a small piece, sometimes just the final bytes, and refuses to hand it over unless paid more. Since a file missing even a few bytes may be unusable, the user is under pressure to pay. Storage networks such as those built on Filecoin, Sia or Arweave defend against this by splitting files into pieces with error-correcting codes and spreading them across many hosts, so the file can be rebuilt without any single host, and by requiring hosts to post collateral and regularly prove they still hold the data. The threat resembles a small-scale version of ransomware.