Parity (https://parity.io/) is a UK-based, venture capitalist-funded, tech start-up company. They provide an Ethereum client, also called Parity, which has an extensive Ethereum wallet and DApp environment for contract deployment. The entire application is written and compiled in the RUST language. The wallets are multi-sig. Multi-sig wallets, in simple words, are wallets that require at least two separate agreements to spend a token from the wallet. These wallets are supposed to be more secure than normal single-sig wallets.
Unfortunately, on July 19, 2017, three multi-sig wallets were exploited from a total of 596 wallets with similar vulnerabilities. Figure 6.10 shows these compromised accounts in Etherscan, the public Ethereum block explorer. When the Parity team got alerted of this hack, they tackled this situation by forming a "White Hat Group" and used the same vulnerability to siphon all the tokens from the remaining 593 wallets into a safe repository so that...