Bitcoin uses proof of work to secure the network, Ripple uses a global consensus system and PPCoin uses proof of stake.

Are there any known alternatives to the above methods?

  • 2
    in the ppc paper they talk about a 'proof of excellence' where all peers compete to solve a game. It is basically proof of work, buta better algorithm could score higher. Mar 20, 2013 at 19:33
  • @David Perry. This is a subtly different question than what you've suggested as a duplicate. This person is asking if there exist alternative distributed synchronization algorithms. The other question asks if the proof-of-work system can prove secondarily-useful work. There is a clear difference.
    – Rooke
    Mar 21, 2013 at 3:50
  • @Rooke fair enough, I'll re-open it. Mar 21, 2013 at 5:08

3 Answers 3


Another alternative is proof of burn.


A really quick answer is this: The proof of work system is a solution to the distributed synchronization issue; in another guise it is called the Byzantine Generals' Problem. Thus, any solution to this problem is an acceptable alternative, however the proof-of-work solution is particularly suited to distributed systems.

You can read Satoshi Nakamoto's discussion of this here.


I have been researching on blockchain for sometime now and some of them I found are a mix of some existing and some proposed.

  1. Proof-of-Stake
  2. Proof-of-Burn
  3. Proof-of-Capacity
  4. Proof-of-Activity
  5. Proof-of-Checkpoint

Source: https://bytecoin.org/blog/proof-of-activity-proof-of-burn-proof-of-capacity/


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.