3 ms·

What do you mean? If I look at the latest block hash and difficulty I can actually measure how much hashing power went into finding such block (and it's a lot).

by sktrdie 11y ago

What do you mean? If I look at the latest block hash and difficulty I can actually measure how much hashing power went into finding such block (and it's a lot). How would you simulate that with timestamps?

kushti 11y ago
You can generate blockchain since genesis setting timestamps every 10 mins so no any difficulty change. And that chain drawn to the moment will be longer than network's.
sktrdie 11y ago
@kushti I think you might have misunderstood how the consensus protocol works in Bitcoin. It's not the longest chain, but the one with the most work put into it that is accepted.
- kushti 11y ago
  @sktrdie Can you please send me link to a spec / source piece proving that?
- sktrdie 11y ago
  @kushti sure: http://bitcoin.stackexchange.com/questions/936/how-does-a-client-decide-which-is-the-longest-block-chain-if-there-is-a-fork http://bitcoin.stackexchange.com/questions/936/how-does-a-cl... http://bitcoin.stackexchange.com/questions/29742/strongest-vs-longest-chain-and-orphaned-blocks http://bitcoin.stackexchange.com/questions/29742/strongest-v... Pieter Wuille is a core developer afaik: "The actual rule always favors the chains which required the most "work"."
  - kushti 11y ago
    @sktrdie Thanks for the links! Ok it seems at the moment Bitcoin uses some kind of a cumulative difficulty. P.S. Joining a network is implemented in the same way usually for both PoW/PoS currencies.
    - sktrdie 11y ago
      By the way, if you're aware of any peer-reviewed papers out there that explain how PoS works, I'd be interested in reading them. Academia has been quite shy on the subject.
      - kushti 11y ago
        Unfortunately, I dont' know any peer-reviewed proof of PoS (im)-possibility, threat model etc. Time is needed here probably, we got good formal framework of PoW only in 2014, 5 years after Nakamotos' WP(I mean Backbone's paper https://eprint.iacr.org/2014/765.pdf https://eprint.iacr.org/2014/765.pdf).

by sktrdie 11y ago

kushti 11y ago

You can generate blockchain since genesis setting timestamps every 10 mins so no any difficulty change. And that chain drawn to the moment will be longer than network's.

sktrdie 11y ago

@kushti I think you might have misunderstood how the consensus protocol works in Bitcoin. It's not the longest chain, but the one with the most work put into it that is accepted.

kushti 11y ago
@sktrdie Can you please send me link to a spec / source piece proving that?
sktrdie 11y ago
@kushti sure: http://bitcoin.stackexchange.com/questions/936/how-does-a-client-decide-which-is-the-longest-block-chain-if-there-is-a-fork http://bitcoin.stackexchange.com/questions/936/how-does-a-cl... http://bitcoin.stackexchange.com/questions/29742/strongest-vs-longest-chain-and-orphaned-blocks http://bitcoin.stackexchange.com/questions/29742/strongest-v... Pieter Wuille is a core developer afaik: "The actual rule always favors the chains which required the most "work"."
- kushti 11y ago
  @sktrdie Thanks for the links! Ok it seems at the moment Bitcoin uses some kind of a cumulative difficulty. P.S. Joining a network is implemented in the same way usually for both PoW/PoS currencies.
  - sktrdie 11y ago
    By the way, if you're aware of any peer-reviewed papers out there that explain how PoS works, I'd be interested in reading them. Academia has been quite shy on the subject.
    - kushti 11y ago
      Unfortunately, I dont' know any peer-reviewed proof of PoS (im)-possibility, threat model etc. Time is needed here probably, we got good formal framework of PoW only in 2014, 5 years after Nakamotos' WP(I mean Backbone's paper https://eprint.iacr.org/2014/765.pdf https://eprint.iacr.org/2014/765.pdf).