There’s no such thing as a backdoor that only works when ‘good guys’ use it.

Brief: A cyberattack tied to the Chinese government penetrated the networks of a swath of U.S. broadband providers, potentially accessing information from systems the federal government uses for court-authorized network wiretapping requests.

Source: Exclusive | U.S. Wiretap Systems Targeted in China-Linked Hack – WSJ (archived due to paywall)

“90% of the Bitcoin network’s mining power is well-coordinated enough to show up together at the same conference…

Bitcoin’s blockchain is actually contolled by a single huge mining pool operating through a set of subsiduaries –  this pool is controlled by Bitmain.”

Source: DSHR’s Blog: “Sufficiently Decentralized”