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Author Topic: [ANN][COS] COSMOS, network of blockchains  (Read 37922 times)
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October 09, 2016, 10:22:31 AM
 #101

Having read your whitepaper, there's no question of your copying the Blocknet's technical approach. You're using DPoS and sidechains/sharding; we're using an inter-chain network overlay, a blockchain router, p2p messaging and atomic protocols.

However, when it comes to how you represent/market yourselves, there's a striking similarity in both concept and wording.
Consider, for example, the third paragraph of your whitepaper: this echoes, almost verbatim, the following:
- a sentence in the second paragraph of our last blog post
- a sentence in our last radio interview
- many other instances, over the course of at least the past year, in which we've described our goal as preserving the security properties of
blockchains in inter-chain scenarios.

Can you please paste the sentence from the second paragraph of your last blog post that you find strikingly similar?  I just want to make sure we're talking about the same parts.

Sure: "The Blocknet is an inter-blockchain application platform, devoted to creating solutions to inter-chain interoperability without sacrificing the security properties of blockchains."

Quote
I can't - and I'm not trying to - stop you from using "internet of blockchains" or phrases about "preserving security properties."
I'm not accusing you of plagiarism either.
But I request, as a matter of prior art, that you both (a) find equivalent but different ways of describing your project, and (b) that consider acknowledging - where relevant - that we precede you in pursuing the vision of inter-chain interoperability and were the first in carving out the concepts that you've arrived at.

I have no qualms changing the phrase.  "Network of blockchains"?  We'll take that then Smiley

Nice one. Sounds good :-)

Quote
I didn't pursue any vision of blockchains until early 2014.  Well, even before then, if you count the fact that since 2013 I had developed exchange software for a crypto-crypto exchange to compete with Cryptsy.  I abandoned that (https://github.com/jaekwon/ftnox-backend) and started working on Tendermint because it is what enables secure PoS.  And we have to get away from PoW in order for the security of many chains to be independent of each other.

http://tendermint.com/blog/security-of-cryptocurrency-protocols/

Looking at BlockNet's vision, it seems like we're fully aligned.  We're not even competing, we're both developing toward a shared system from different angles.  To call us plagiarizing is a stretch... we've created and proposed solutions to longstanding problems in the crypto space.

Absolutely. I'm explicitly not accusing you of plagiarism.

Quote
Here, I've changed our tagline.  We'll update them on our website too.  I acknowledge that jl777 has had great ideas, inevitable ideas.  I'd like for us to take part in the journey.  The internet of blockchains will not be centralized, or hierarchical.  Like the WorldWideWeb that preceded it, it is connected in every possible way.

Onward to a decentralised internet! For the record though, jl777 has nothing to do with the Blocknet. He's behind that SuperNET thing, right?
Anyway, yes, it's great that there are a few projects working toward "web 3.0".

All the best with the project,

Arlyn

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October 09, 2016, 11:14:57 PM
 #102

Sure: "The Blocknet is an inter-blockchain application platform, devoted to creating solutions to inter-chain interoperability without sacrificing the security properties of blockchains."

Nice, well, I think the obvious resolution to this is to cite.  I need to be clear on something though... what do they mean "sacrificing the security properties of blockchains"?  Why would chain interoperability sacrifice the security properties of blockchains?  Are they talking about, like, how metacoins sacrifice the security properties of the underlying blockchain?

Also, interesting that it's called an "application platform".  I don't think we're building the application platform, but rather the blockchain operating system itself, aka the "protocol".

Onward to a decentralised internet! For the record though, jl777 has nothing to do with the Blocknet. He's behind that SuperNET thing, right?
Anyway, yes, it's great that there are a few projects working toward "web 3.0".

Oops, yes, he's behind the SuperNET thing.  Who's behind BlockNet?  You?

All the best with the project,

Danke, to you as well.
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October 13, 2016, 03:17:12 PM
 #103

actually ,if post information of your team,maybe higher authoritative

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October 13, 2016, 03:20:36 PM
 #104

Can you explain this project in simpler terms? What are you guys trying to do and what value will come out of it? How could the world not go without this project?

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October 14, 2016, 07:45:04 AM
 #105

Can you explain this project in simpler terms? What are you guys trying to do and what value will come out of it? How could the world not go without this project?

thats why we need more information

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October 14, 2016, 09:38:08 AM
 #106

Can you explain this project in simpler terms? What are you guys trying to do and what value will come out of it? How could the world not go without this project?

thats why we need more information

some samples in real life usability 1 or 2

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October 14, 2016, 11:52:43 AM
 #107

Hi sir, i had some questiona about translation.

Pm sent.

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October 14, 2016, 01:01:04 PM
 #108

When will we see a roadmap? What is your time to revenue?

Check out the Powerledger ICO.... Disrupting the power industry
https://bounty.powerledger.io/btctalk/?hash=n81HRsvnAyG3cfl6
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October 15, 2016, 06:44:30 PM
 #109

                                   COSMOS: We delayed our crowdfund until Q1 2017
  The going date is now Feb 15th, 2017. That will give us time to finish the production version of Tendermint and an alpha version of the hub.

   Cheers, Jae

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October 24, 2016, 09:07:32 AM
 #110

any bounty for newsletter sub dev???

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November 28, 2016, 12:46:31 PM
 #111

It's great.


Is there any symbol or icon of cosmos yet ?


From wan.
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November 29, 2016, 02:08:52 PM
 #112

It it great project.

I think the devs need promotion and marketing specialist.

to say the potential of this amazing project to generals.


Wow.


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December 01, 2016, 12:40:33 PM
 #113

everyone need 50,000USD to attent pre-sale, it is too much
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December 01, 2016, 11:44:47 PM
 #114

Hi everyone, a couple of announcements:

We will soon reach out to translators.  **PLEASE DO NOT REPLY ON THIS THREAD!  Just PM me.  Also include your price, if you want.**.  If you want to maintain translations subs, please PM me as well.  Thank you for the support and interest!

Also, check out the video: https://www.youtube.com/watch?v=b-ytzLX-2EE

And our official Reddit: http://reddit.com/r/thecosmos

We're getting more interest for Cosmos integration every week.  More announcements coming, please stay tuned!

- Jae

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December 01, 2016, 11:46:01 PM
 #115

everyone need 50,000USD to attent pre-sale, it is too much

Sorry about that, it's just too much work to handle pre-fundraiser agreements manually.  We'll open up the fundraiser to everyone though.
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December 01, 2016, 11:47:58 PM
 #116

actually ,if post information of your team,maybe higher authoritative

Jae (me) and Ethan from the Tendermint team, are two directors involved in the Cosmos Network Foundation.  There are others involved with Cosmos as well.

http://tendermint.com/about
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December 01, 2016, 11:50:29 PM
 #117

New blog post, BFT: The Most Secure Proof-of-Stake
From https://cosmos.network/blog/bft-the-most-secure-proof-of-stake

Bitcoin brought the world’s attention to the blockchain. But alas, the Bitcoin version of blockchain isn’t sufficient for the world’s blockchain needs. That is because Bitcoin’s proof of work (PoW) consensus requires an enormous amounts of energy. In addition, transactions are painstakingly slow, taking an hour or longer to commit. And because PoW miners have little incentive to be loyal to one chain or other, upgrades are difficult to coordinate.

We need an approach to manage blockchains securely that does not impose a huge energy cost on our planet. That approach is Byzantine fault-tolerance (BFT)-based proof-of-stake (PoS). We call it BFT-PoS.

Before I delve into the merits of BFT-PoS, let me first address the concept of Byzantine faults without going into confusing detail about Lamport’s General and his armies.

In a distributed system, where data is replicated across hundreds or thousands of nodes, there needs to be some type of fault-tolerance or consensus algorithm, for the simple fact that computers break down or go offline from time to time. So if a portion of those nodes fail, the system as a whole still needs to reach a consensus.

Standard fault-tolerant consensus algorithms like Raft and Paxos assume that when a node fails, it simply stops working and doesn’t send back a reply. Google, Facebook, and some existing database products already use this family of consensus algorithms within their firewalls to ensure that services remain available despite faulty computers.

But these algorithms aren’t suitable for public blockchains, because there is no firewall in a public blockchain. Anyone with mining power (in PoW) or staking tokens (in PoS) can participate, or even try to sabotage the network. To reach consensus on a public blockchain, we need Byzantine fault-tolerance. In a Byzantine fault, the faulty node can behave in a completely arbitrary manner. Nodes can even collude to try and maximize the damage they cause.

So essentially, the purpose of a BFT consensus algorithm is to establish trust between otherwise unrelated parties over an untrusted network like the Internet.

BFT is nothing new. The concept was first introduced in an academic paper by Lamport, Shostak, and Pease in 1982. But Lamport et al only demonstrated the theoretical feasibility of the algorithm in a synchronous environment, where all the messages always arrive on time.

But in the real world, you can’t really trust the Internet to deliver anything on time. So in 1988, Dwork, Lynch, and Stockmeyer (DLS) proposed an algorithm that works in mostly asynchronous environments. Later in 1999, Miguel Castro and Barbara Liskov proposed a practical solution for continuous BFT consensus that was, and still is today, the state-of-the-art in BFT algorithms.

But for a long time, the mainstream press ignored these seminal works. Nobody understood the importance of BFT outside academia and major institutions like IBM and DARPA, until 2009 when Bitcoin came along. Bitcoin was the first open decentralized application to provide BFT consensus on a global currency ledger, but using a completely novel solution to the Byzantine general’s problem: PoW.

In PoW, miners compete, based on who has the most processing power, to validate transactions. And for their efforts they are rewarded with transaction fees and newly minted bitcoins. This is how Bitcoin creates new currency. Bitcoin miners around the globe compete in a lottery-like system for these newly issued bitcoins, and the efficient market makes it so that the cost of the energy used by the global mining network is on the order of the block reward (plus transaction fees). Today, that turns out to be around $1M worth of electricity per day. In addition, Bitcoin mining is being commoditized by large data centers in places of the world where electricity is more affordable, making it difficult for laymen to participate.

PoS, on the other hand, does away with the energy dependence of PoW entirely. In PoS, miners are replaced with “validators” who have a stake in the system. Validators don’t have to invest in expensive processing systems but they do have to purchase “staking tokens.” Any normal laptop will suffice to solve the algorithm.

Peercoin, BitShares, Nxt, and others already use some form of PoS, and Ethereum is planning a move to PoS in the near future. Yet, while PoS makes practical sense, many people have rallied against the use of PoS, claiming it is impossible to secure. But that is simply not true. Using BFT, you absolutely can secure PoS. It’s just that we haven’t seen any BFT-PoS public blockchains yet.

While the theory may be difficult to explain or understand, the ultimate results provided by proper BFT algorithms are simple to grasp. Unlike PoW blockchains, BFT-PoS blockchains do not fork (i.e. get double-spend attacked) at all unless ⅓ or more validators coordinate such an attack. And, when 1/3 or more validators do cause a double-spend attack, we can computationally determine which validators were responsible for the attack, destroy their staking tokens and eject them from the network. It’s as if the staking tokens are virtualized PoW miners that blow up when used to attack the system. No other blockchain consensus algorithm, including PoW, can provide the level of collateralization that is possible with BFT-PoS.

BFT-PoS performs extremely well. Today, in global public blockchain with a few hundred validators, you can get transaction finality on the order of 3 seconds, easily – no need to wait for additional block confirmations! The theory has proven to us that these are optimal fault-tolerance thresholds for “instant-finality” blockchains. While more validators does slow down consensus, if Nielsen’s law continues to hold, we’ll even be able to support an exponentially increasing number of validators every year with the same performance.

In addition, BFT-PoS will also increase the security of mobile wallets. Few of the mobile wallets in existence today take full advantage of the security offered by Bitcoin, for the simple fact that nobody is willing to wait an hour for a transaction to clear. Instead, most wallets just assume that the person sending the money isn’t trying to double spend it. And, though we don’t have time to dive into it here, efficient mobile wallet protocols, or “light client SPV” protocols are the key to future blockchain interoperability.

While PoW worked well for Bitcoin, it’s costly, slow, and environmentally unfriendly. The best alternative out there right now is BFT-PoS. It’s an enduring, energy efficient solution that works well in asynchronous environments. And best of all, because BFT was developed by the best and the brightest in the computer science industry, it’s provably secure. You can’t do any better than that.

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December 02, 2016, 01:14:20 AM
 #118

I am looking forward to new information coming out.
Good luck on your development.





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December 02, 2016, 09:23:01 AM
 #119

New blog post, BFT: The Most Secure Proof-of-Stake
From https://cosmos.network/blog/bft-the-most-secure-proof-of-stake

Bitcoin brought the world’s attention to the blockchain. But alas, the Bitcoin version of blockchain isn’t sufficient for the world’s blockchain needs. That is because Bitcoin’s proof of work (PoW) consensus requires an enormous amounts of energy. In addition, transactions are painstakingly slow, taking an hour or longer to commit. And because PoW miners have little incentive to be loyal to one chain or other, upgrades are difficult to coordinate.

We need an approach to manage blockchains securely that does not impose a huge energy cost on our planet. That approach is Byzantine fault-tolerance (BFT)-based proof-of-stake (PoS). We call it BFT-PoS.

Before I delve into the merits of BFT-PoS, let me first address the concept of Byzantine faults without going into confusing detail about Lamport’s General and his armies.

In a distributed system, where data is replicated across hundreds or thousands of nodes, there needs to be some type of fault-tolerance or consensus algorithm, for the simple fact that computers break down or go offline from time to time. So if a portion of those nodes fail, the system as a whole still needs to reach a consensus.

Standard fault-tolerant consensus algorithms like Raft and Paxos assume that when a node fails, it simply stops working and doesn’t send back a reply. Google, Facebook, and some existing database products already use this family of consensus algorithms within their firewalls to ensure that services remain available despite faulty computers.

But these algorithms aren’t suitable for public blockchains, because there is no firewall in a public blockchain. Anyone with mining power (in PoW) or staking tokens (in PoS) can participate, or even try to sabotage the network. To reach consensus on a public blockchain, we need Byzantine fault-tolerance. In a Byzantine fault, the faulty node can behave in a completely arbitrary manner. Nodes can even collude to try and maximize the damage they cause.

So essentially, the purpose of a BFT consensus algorithm is to establish trust between otherwise unrelated parties over an untrusted network like the Internet.

BFT is nothing new. The concept was first introduced in an academic paper by Lamport, Shostak, and Pease in 1982. But Lamport et al only demonstrated the theoretical feasibility of the algorithm in a synchronous environment, where all the messages always arrive on time.

But in the real world, you can’t really trust the Internet to deliver anything on time. So in 1988, Dwork, Lynch, and Stockmeyer (DLS) proposed an algorithm that works in mostly asynchronous environments. Later in 1999, Miguel Castro and Barbara Liskov proposed a practical solution for continuous BFT consensus that was, and still is today, the state-of-the-art in BFT algorithms.

But for a long time, the mainstream press ignored these seminal works. Nobody understood the importance of BFT outside academia and major institutions like IBM and DARPA, until 2009 when Bitcoin came along. Bitcoin was the first open decentralized application to provide BFT consensus on a global currency ledger, but using a completely novel solution to the Byzantine general’s problem: PoW.

In PoW, miners compete, based on who has the most processing power, to validate transactions. And for their efforts they are rewarded with transaction fees and newly minted bitcoins. This is how Bitcoin creates new currency. Bitcoin miners around the globe compete in a lottery-like system for these newly issued bitcoins, and the efficient market makes it so that the cost of the energy used by the global mining network is on the order of the block reward (plus transaction fees). Today, that turns out to be around $1M worth of electricity per day. In addition, Bitcoin mining is being commoditized by large data centers in places of the world where electricity is more affordable, making it difficult for laymen to participate.

PoS, on the other hand, does away with the energy dependence of PoW entirely. In PoS, miners are replaced with “validators” who have a stake in the system. Validators don’t have to invest in expensive processing systems but they do have to purchase “staking tokens.” Any normal laptop will suffice to solve the algorithm.

Peercoin, BitShares, Nxt, and others already use some form of PoS, and Ethereum is planning a move to PoS in the near future. Yet, while PoS makes practical sense, many people have rallied against the use of PoS, claiming it is impossible to secure. But that is simply not true. Using BFT, you absolutely can secure PoS. It’s just that we haven’t seen any BFT-PoS public blockchains yet.

While the theory may be difficult to explain or understand, the ultimate results provided by proper BFT algorithms are simple to grasp. Unlike PoW blockchains, BFT-PoS blockchains do not fork (i.e. get double-spend attacked) at all unless ⅓ or more validators coordinate such an attack. And, when 1/3 or more validators do cause a double-spend attack, we can computationally determine which validators were responsible for the attack, destroy their staking tokens and eject them from the network. It’s as if the staking tokens are virtualized PoW miners that blow up when used to attack the system. No other blockchain consensus algorithm, including PoW, can provide the level of collateralization that is possible with BFT-PoS.

BFT-PoS performs extremely well. Today, in global public blockchain with a few hundred validators, you can get transaction finality on the order of 3 seconds, easily – no need to wait for additional block confirmations! The theory has proven to us that these are optimal fault-tolerance thresholds for “instant-finality” blockchains. While more validators does slow down consensus, if Nielsen’s law continues to hold, we’ll even be able to support an exponentially increasing number of validators every year with the same performance.

In addition, BFT-PoS will also increase the security of mobile wallets. Few of the mobile wallets in existence today take full advantage of the security offered by Bitcoin, for the simple fact that nobody is willing to wait an hour for a transaction to clear. Instead, most wallets just assume that the person sending the money isn’t trying to double spend it. And, though we don’t have time to dive into it here, efficient mobile wallet protocols, or “light client SPV” protocols are the key to future blockchain interoperability.

While PoW worked well for Bitcoin, it’s costly, slow, and environmentally unfriendly. The best alternative out there right now is BFT-PoS. It’s an enduring, energy efficient solution that works well in asynchronous environments. And best of all, because BFT was developed by the best and the brightest in the computer science industry, it’s provably secure. You can’t do any better than that.



The BFT-POS is impressive and dynamic algorithm.

It is worth to look in

from wan.
dbstmddhks
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December 08, 2016, 06:29:42 AM
 #120

The slack of cosmos and tendermint is very busy.

But this thread is some cold now.

If you want to know more about his prjoect, Go to slack.


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