Summary

• TOR needs defense against DOS (denial of service) attack
  • The solution they found is simple a proof of work, when entering an onion site the user will have to solve a simple small puzzle. That is all!
    • This will eliminate bots and therefore reduce the DOS attacks that slow down the TOR network quite often.

Note These are exciting news for journalists, political activists and experts in cyber security, many applications run using onion for privacy reasons