Skip to content
  • Home Home Home, current page.
  • Moments Moments Moments, current page.

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
hugohanoi's profile
Hugo Nguyen
Hugo Nguyen
Hugo Nguyen
@hugohanoi

Tweets

Hugo Nguyen

@hugohanoi

I chain, therefore I am ⛓️

Joined April 2012

Tweets

  • © 2018 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    Hugo Nguyen‏ @hugohanoi Sep 13

    1/ Nice to see more in-depth articles investigating the extremely important role randomness plays in blockchains 🙂 h/t @aparnalocked However, IMO this analysis of randomness is incomplete 🙁https://www.tokendaily.co/blog/randomness-in-blockchains …

    11:52 PM - 13 Sep 2018
    • 2 Retweets
    • 9 Likes
    • Kay Kurokawa Kartik Talwar Akarsh Agarwal Dan Hedl Steve Lee unconfirmed edi Embilysays @Cryptocoin
    3 replies 2 retweets 9 likes
      1. New conversation
      2. Hugo Nguyen‏ @hugohanoi Sep 13

        2/ This analysis only focuses on the superficial role of randomness in Nakamoto consensus: solving the leader-election problem. 
But solving the leader-election problem is only half the battle.

        2 replies 0 retweets 0 likes
        Show this thread
      3. Hugo Nguyen‏ @hugohanoi Sep 13

        3/ There’s a much, much bigger role randomness plays in Nakamoto consensus beyond leader election: "unforgeable costliness". h/t @NickSzabo4 again for the term.

        1 reply 0 retweets 0 likes
        Show this thread
      4. Hugo Nguyen‏ @hugohanoi Sep 13

        4/ Randomness is what allows PoW mechanism to approximate energy burnt in the creation of blocks. This burnt energy secures the chain from past AND future attacks. I explored this role randomness plays in Bitcoin in my recent article:https://medium.com/@hugonguyen/bitcoin-chance-and-randomness-ba49a6edf933 …

        1 reply 0 retweets 1 like
        Show this thread
      5. Hugo Nguyen‏ @hugohanoi Sep 13

        5/ Bitcoin is past-proof because it would cost an attacker an enormous amount of energy & money to forge an alternative chain with a higher cumulative difficulty. Thanks to randomness-based PoW.

        1 reply 1 retweet 3 likes
        Show this thread
      6. Hugo Nguyen‏ @hugohanoi Sep 13

        6/ Bitcoin is future-proof because it would provide an automated way for network nodes to come to consensus in the case of a network split, whether it's intentional or accidental (e.g., a network partition). Thanks again to randomness-based PoW.

        2 replies 1 retweet 1 like
        Show this thread
      7. Hugo Nguyen‏ @hugohanoi Sep 14

        7/ Naive randomness mechanisms in PoS protocols do not give you either of these protections. PoS inevitably requires the intervention of trusted 3rd parties and significantly increases the social attack surface. In other words, PoS is nowhere near as trust-minimized as PoW.

        2 replies 1 retweet 3 likes
        Show this thread
      8. Hugo Nguyen‏ @hugohanoi Sep 14

        8/ In summary, randomness in PoW solves *two* crucial problems: a/ Leader-election b/ Unforgeable costliness Leader-election is only half the battle, arguably the less important half.

        2 replies 2 retweets 4 likes
        Show this thread
      9. Hugo Nguyen‏ @hugohanoi Sep 14

        Hugo Nguyen Retweeted Hugo Nguyen

        9/ P.S. For a list of my writings on the problems with PoS:https://twitter.com/hugohanoi/status/1021831408489136128 …

        Hugo Nguyen added,

        Hugo Nguyen @hugohanoi
        "Irretrievable sunk cost" is the key in PoW. The "stake" used in PoS creates a temporary illusion of security/immutability. It's neither sunk nor irretrievable, and that's a fundamental flaw you can never get around. https://twitter.com/francispouliot_/status/1021563523598573568 …
        Show this thread
        2 replies 0 retweets 1 like
        Show this thread
      10. End of conversation
      1. New conversation
      2. Aparna Krishnan‏ @aparnalocked Sep 14
        Replying to @hugohanoi

        Again, the focus of this post was on only randomness for leader election. We have a whole paper that does a more in othe analysis of all the parts that you talk about :)https://github.com/Mechanism-Labs/MetaAnalysis-of-Alternative-Consensus-Protocols …

        1 reply 1 retweet 6 likes
      3. Hugo Nguyen‏ @hugohanoi Sep 14
        Replying to @aparnalocked

        Ah I see, did not know there was another part 😂 I'm generally trigger-happy because I'm frustrated with all the PoS discussions of randomness that say nothing about unforgeable costliness 🙂 Sorry for jumping the gun then. Look forward to part 2!

        1 reply 0 retweets 2 likes
      4. Hugo Nguyen‏ @hugohanoi Sep 14
        Replying to @hugohanoi @aparnalocked

        >None of the subcommittee selection protocols that we at Mechanism Labs have analyzed satisfied both properties of being unbiasable FWIW, I highly agree with this- hard to guarantee both liveness & safety RE:leader-election randomness. Not sure I'd agree with the compromise tho.

        1 reply 0 retweets 1 like
      5. Aparna Krishnan‏ @aparnalocked Sep 14
        Replying to @hugohanoi

        I think that's where the dimension of synchrony comes in. I definitely have not even touched upon it in this post because that's a much longer analysis.

        1 reply 0 retweets 1 like
      6. Hugo Nguyen‏ @hugohanoi Sep 14
        Replying to @aparnalocked

        Favoring liveness over safety or relaxing synchrony assumptions won't make PoS protocols any safer. PoS camp likes to say that Bitcoin also doesn't work under a fully async setting, but they overlook important nuances in the level of security offered in the semi-sync setting.

        2 replies 0 retweets 2 likes
      7. Hugo Nguyen‏ @hugohanoi Sep 14
        Replying to @hugohanoi @aparnalocked

        Hugo Nguyen Retweeted Hugo Nguyen

        Simply put, under semi-sync setting, PoW strongly satisfies liveness & consistency. Whereas PoS protocols do not & break down under a number of scenarios. See my 2 articles for a few examples of these scenarios & the addition by @Datavetarenhttps://twitter.com/hugohanoi/status/1021832568314843136 …

        Hugo Nguyen added,

        Hugo Nguyen @hugohanoi
        For those who are interested, my prior articles on this: 1/ https://medium.com/@hugonguyen/proof-of-stake-the-wrong-engineering-mindset-15e641ab65a2 … 2/ https://medium.com/@hugonguyen/proof-of-stake-private-keys-attacks-and-unforgeable-costliness-the-unsung-hero-5caca70b01cb …
        Show this thread
        0 replies 0 retweets 2 likes
      8. End of conversation
      1. Neil Hooey‏ @nhooey Sep 14
        Replying to @hugohanoi @aparnalocked

        @el33th4xor What do you think about this thread by @hugohanoi?

        0 replies 0 retweets 0 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo

    Loading seems to be taking a while.

    Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

      Promoted Tweet

      false

      • © 2018 Twitter
      • About
      • Help Center
      • Terms
      • Privacy policy
      • Cookies
      • Ads info