Shreemoon Rajbhandarisubmitted by Shreemoon to loopringorg [link] [comments]
My Intern Experience
During my time as an undergraduate, one of the key experiences recommended is to do an internship. Gaining work experience as an intern overseas will improve a skill set in my area of interest. Working somewhere as culturally different and economically significant as China is a talking point in any interviews. There are many reasons that made me choose to do an internship in China. Definitively the best part of the experience has been living out of your comfort zone. Encountering new situations and experiences, that increase my self awareness, my capabilities and also to discover my weaknesses.
Over the past 2 years, we have seen many digital currencies/cryptocurrencies being introduced globally.These have added the aspect of using this financial ecosystem to eventually solve social issues. This could be the application of Blockchain technology in areas like logistics/supply chain to food security. Eventually, there would be many more areas where blockchain and related technology developers would be needed. It's emerging to change the way we solve the many roadblocks that we face.
Blockchain is considered to be one of the most trending topics. This is the right time for me to learn about the technology and start implementing. Blockchain is a notion that can be implemented directly or indirectly to any sector as such. Only two months prior, I had a minimal amount of knowledge about blockchain innovation, and my insight into blockchain comprised distinctly of an obscure comprehension of bitcoin and cryptographic money all in all.
During my internship, I was given investigation material to help assemble my base comprehension of Loopring and the blockchain innovation that it depends on. In the wake of beginning at Loopring, I have been given significantly more prominent chance to learn. While my comprehension of blockchain is still new, it has improved extensively since my first day at the organisation.
In this post, I would like to talk about two cryptographic methods aiming to give privacy to blockchain technology ; the zk-SNARKS and zk-STARKS protocols are two significant examples. We will look into their advantages and disadvantages, comparison between two protocols, and conclusion.
ZK-SNARKS vs ZK-STARKS
Along with the countless benefits of the Internet from which we can benefit, when we use it for social media or business company purposes, privacy is at greater risk. Approximately 90 million of Facebook users information were damaged by Cambridge Analytical data. The Wall Street stated that “ this is just the beginning, and the results are expected to grow”. The Equifax data breach revealed information on social media channels from private users. Thus, birth dates were exposed to the majority of the populations. Due to the Uber hack, data from over 55 million customers were also shared and exposed.
Privacy has consistently been seen as a valuable element within the cryptocurrency community. There is always a growing focus on improving privacy within the cryptocurrency space. Bitcoin, Ethereum, Litecoin and many other cryptocurrencies are all actively searching for the most convenient approaches to increase their security. It is the antecedent to fungibility, which is vital for a broadly used form of money. Additionally, most crypto-asset holders do not want their transaction history to be completely public to the world. Among the different cryptographic methods aiming to give privacy to blockchain technology; the zk-SNARK and zk-STARKS protocols are two main significant examples.
Two leading technologies today offer their cryptocurrencies - Monero and zcash— and strive to address protection issues. Monero uses the technology of Ring Confidential Signature. By contrast, Z-Cash uses zk-SNARK( Zero-Knowledge transparent knowledge argument), a technology that provides the ability to conduct anonymous transactions.
In recent years, zk-SNARKS has exploded as the most promising technology to solve blockchain privacy. It is a technology derived from proofs of zero-knowledge, a type of proof that anyone with a verification key can check this “proof” without disclosing the information itself. If the statement holds, a verifier will be convinced by a correct proof. If the statement is false, it is true that no prover can convince a verified statement.
zk-SNARK stands for :
- Zero-knowledge : if the statement is true, there is nothing the verifier learns beyond the fact that the statement is true.
- Succinct : The proof size needs to be small enough in a few milliseconds to be verified.
- Non-interactive :Only one set of information is sent to the verifier for verification, therefore there is no back and forth communication between the prover and verifier.
- Argument of Knowledge : A computationally soundproof: soundness runs counter to a prover leveraging polynomial-time, i.e. limited computing. Also, Without access to the witness (the private input needed to prove the statement), the evidence can not be constructed.
zk-SNARKS aims to provide fast, scalable solutions to ensure financial security. Therefore, transaction encryption is possible.When zk-SNARK is applied to a cryptocurrency, it implies you can conceal the majority of the transaction data information. This incorporates the sender address, collector address, just as the transaction sum amount. zk-SNARKS enables us to shroud the majority of this data information, while likewise enabling the system to affirm and verify the transactions. It amplifies security while maintaining consensus. In the realm of blockchain, it is one of the most exceptional blockchain level protection innovation being used.
With the launch of version 3.0, Loopring’s decentralised protocol solution struck a noteworthy milestone in early May- adding off-chain scaling and fee optimisation using zk-SNARKs. Low fees, liquidity, transparency and security are the key goal of the loopring solution. Loopring says the new Loopring 3.0 based zk-SNARK will increase trade speeds and on-chain activity efficiency tenfold. The data previously stored on-chain in Loopring 3.0 is now stored off-chain in a Merkle tree and then used as required in zk-SNARKS, updating the tree.
Be that as it may, there are a few issues with zk-SNARKS. The main problem has been the need for a trusted setup. zk-SNARKS rely on a permission private key. This essentially undermines the entire purpose of decentralised public blockchain. By introducing the need to trust a person rather than code, you threaten the entire concept of trustlessness. In theory, a prover with sufficient computational power could create fake proofs, and this is one of the reasons why many consider quantum computers as a threat to zk-SNARKs (and blockchain systems).
Last year zk-SNARKS were incorporated on a MIT Tech Review list of the top 10 Breakthrough Technologies of 2018 among AI advancements. zk-SNARKS allows both a tremendous speedup in verifying the correctness of a computation while at the same time it hides the private details from prying eyes. Some of the potential uses citied in MIT article were verifying you’re over 18 without having to share your date of birth, and providing you have a enough money in your back account as collateral without having to give away account details like your exact balance. It establishes trust which you need to interact on the blockchain. Zk-SNARK proofs are as of now being used on Zcash, on JP Morgan Pursue's blockchain-based payment system, and as an approach to safely validate customers to servers.
The more developed version of zk-SNARKS is called zk-STARKS which stands for :
Argument of Knowledge
zk-STARKS verifications are currently being touted as the better than ever form of the convention, tending to a considerable lot of the past disadvantages of zk-SNARKs. It has demonstrated an approach to accomplish a similar degree of privacy as zk-SNARKS without the requirement for the trusted setup. Starks are practically superior to Snarks as they require weaker crypto suppositions, they don't require a trusted setup and are post-quantum resistant. zk-SNARKs are based on Elliptic-Curve Cryptography, which is susceptible to advances in Quantum-Computers. zk-STARKs, on the other hand are Post-Quantum system meaning that even if Quantum-computers become powerful and ubiquitous they will not have an advantage, compared to classical computers, in breaking zk-STARKs. Anyway they have a noteworthy downside, as in the proof being too enormous. Their problem is their storage requirements. STARKs are doubly scalable, which means the proof verification is exponentially faster than the original computation’s time but the drawback is the size of the proof they create being too large, possibly 2 or 3 orders of magnitude more than those produced by zk-SNARKs. One example : StarkWare solves the inherent problems of scalability and privacy of blockchains. Using STARK technology, they generate a full proof-stack to produce and verify computer integrity tests. They utilise STARKs to batch transactions into a single proof that is verified on Ethereum. Matt Taylor states that the present iteration of StarkDEX demonstrates the viability of using STARKs for the scalability of Layer-2 by showing a substantial rise in the amount of blockchain transaction.
The idea of zk-STARKS was proposed by Eli-Ben Sasson, a professor at the Technion-Israel institute of Technology. zk-STARKS provide proofs that can be verified a lot quicker than zk-SNARKS. At the present time, Z-cash and Ethereum are on the whole considering to utilize zk-STARKS. zk-STARKS have solved the trusted setup issue. They have totally expel the requirement for multiple parties to create the private key required for the string. Rather everything needed to produce the proofs is public and the verifications are generated from arbitrary numbers. zk-STARKS actually removed the necessity in zk-SNARKS for unbalanced cryptography and rather utilizes the hash fuctions like those found in Bitcoin mining. In addition, they ought to have longer timeframe of realistic usability as far as their crytographic resilience than zk-SNARKS. However, there are some impediment of zk-STARKS, the main issue with zk-STARKS is their size. The verifications it uses are basically too enormous to use in many blockchains as they stand. As indicated by Vitalik Buterin, zk-STARKS will result in proofs of a couple of hundreds kilobytes versus the 288 bytes seen in zk-SNARKS.
The Difference Between zk-STARKS and zk-SNARKS.
Source : The Medium - Coinmonks
The complexity of communication : With the computation’s expanded complexity, the zk-SNARKS communication complexity also increases linearly, whereas zk-STARKs develops in the opposite direction and grows slowly as the computation size grows.The graph above shows that the communication required by the zk-STARKs to complete the calculation rises much slower than zk-snarks as the underlying evidence increases in complexity.
Source : The Medium - Coinmonks
The complexity of the verifier : zk-STARKs slightly widening with the development in computation size. On the other side, for confirmation evidence, zk-SNARKs requires less time than zk-STARKs. zk-STARKs, for instance need up to 100 ms to verify and zk-SNARKs need only up to 10ms. The graph above illustrates the the time taken by the zk-STARK to verify an evidence rises very slowly compared to the zk-SNARK as the underlying evidence increases in complexity.
Overall these two protocols have excellent potential in the cryptocurrency globe and can be a breakthrough avenue for mainstream implementation. Both conventions are truly needed steps to protect our privacy.
Is quantum resistance to protect against hacking, or against “fast mining” (preventing inequality between PoW miners)? How is it possible to guarantee quantum resistance? Isn’t our understanding of quantum computing just based on theories since quantum computers are not fully functional yet?Side chains will run parallel and be interoperable with the main chain. Side chains allow for new, more efficient, consensus mechanisms as well as smart contract functionality. Eventually other major blockchains will be interoperable with Hcash, through side chains and relays, DAG EVM for ETH, and other “Layer 2” solutions (Lightning Network for BTC and BTC forked code). Side chains allow for different scalability methods, flexibility and accessibility.
What do you mean by “exchange of value and valuable information”? Is this the exchange of coins and smart contracts?Quantum resistance is the protection against attacks made by quantum computers, which is currently contrasted by what we know about classical computers. Quantum computers weaken the security assumptions of certain types of cryptography, including ECDSA. If ECDSA were broken, attackers could steal balances in addresses that have made previous spends because the ECDSA public key for the address is revealed to the blockchain. Addresses with unexposed ECDSA keys will be resistant to this type of attack, as they are secured by RIPEMD160 and their ECDSA keys have not been revealed. Quantum resistance does not mean quantum proof. Quantum resistance means that quantum-based attacks do not have a significant advantage over the computers we have today. Based on what we currently know, our signature scheme is quantum resistant. No one knows what the future holds which is why it is important to always continue research and development into quantum resistant cryptography.
Imagine that in 2 years, a kid walks up to you and asks, “What do you do and how does it help society?”The “value” you are referring is not derived from our current understanding of value (fiat). The “true value” that blockchain systems hold is stored in the hashes themselves. Data and information is king.
An uninformed businessman who has no understanding of blockchain, but has heard Bitcoin approaches you. How do you explain your product and the benefits to him so that he remembers to give you a call the next day?We are one of many projects that helped build a more secure web of connected devices, and revolutionized peoples’ opinion on value and what really matters.
After reviewing the Hcash source code on GitHub https://github.com/HcashOrg/hcashd, I've found that almost all the Hcash main chain code has been written by SJTU (Shanghai Jiao Tong University), for example https://github.com/sammy00 https://github.com/yczhangsjtu. What have other contributors, such as the Nucleus Team, done for Hcash?Tell him to do his research on blockchain first before selling him on some grand idea. Smart investors grow a stable smart economy, not dumb money.
The main chain public repo hasn’t been updated very frequently.Shanghai Jiao Tong University’s Lab of Cryptography and Computer Security is the primary contributor to the main chain code. It is no small feat to have the 4th best university in China working on this project. The Nucleus Team is working with them to finish main chain testing. After the main chain launch, the Nucleus team will focus on the future development for Hcash including our side DAG EVM and main chain Lightning interoperability.
When will the swap from Hshares to Hcash take place?Please refer to our new GitHub. The frequency of updates will increase as we approach/ pass the main chain launch.
What is the exact date of main chain launch?The swap to the main chain will take place after the main chain launch mid-February. Announcements will be made as to how and where you can swap your Hshares for Hcash.
Will you provide interoperability for all the existing blockchains?The main chain launch will take place mid-February. We are aiming for release on February 15th.
Will the interoperability between the blockchains support both transfer of data and transfer of value?We hope to provide interoperability for all blockchains in the future. That is a lot of work though. We will start with the larger chains that have healthy development and community sizes first. To make this easier, we plan to provide a back-end solution for new blockchains to make this process easier.
What is a block-less blockchain? Is this a traditional distributed system?Yes
How will Hcash bridge block-less and traditional blockchains?A block-less blockchain accomplishes the same goals as a traditional blockchain by using consensus to determine the order of transactions. A block-less blockchain, such as a DAG, allows for faster consensus without traditional block size requirements. Faster consensus means higher throughput.
What signature scheme will you use to achieve quantum resistance? Why?Through relays between our main chain and side DAG. A more technical analysis will be available in our upcoming yellow paper.
Provide an overview as to how inoperability will be achieved.Hcash is using the BLISS signature scheme. Hcash’s version of BLISS has been hardened to mitigate side channel attacks. BLISS was chosen for its efficient key and signature size.
Specifically, what is the theory behind Hcash’s interoperability?We will be using relays to Hashed Timelock Contracts for Lightning Network interop on our main chain, relays and colored coins that operate with our DAG EVM, bridges to side chains for more uncommon chains, and back-end protocols for newer blockchains.
What is the timeline for interoperability? Will this be the main focus of Hcash? When can be expect an Alpha version?This answer would be longer than the entire AMA. Unfortunately, the specifics will have to wait until the yellow paper release. In the meantime, I would read the Lightning Network whitepaper because it is an excellent source of information. You could also research BTC relays and EVMs.
How will swap values be calculated when switching between blockchains? Is it based on the current market value?We will be updating the roadmap in Q2. Interop timeframes will be easier to gauge after the main chain release. There are quite a few ideas around what we would like to tackle next, whether it would be assisting other projects on Lightning Network development, the DAG EVM implementation, or possibly both at the same time.
Will you update the whitepaper to include a comprehensive overview of interoperability, its theory and its exchange functions?Yes, it would be based on the current, real time market value.
Can you explain who will use the Hcash? I am trying to figure out where the supply and demand will come from.In the coming months we plan to do an update on the white paper. The technical analysis will be provided in our yellow paper. These will be detailed in the updated roadmap to be released after the main chain launch.
Will you be hiring an advertising team?Our target audience is everyone, from people playing mobile games to supporting business and government logic. The supply and demand will come with the need to transfer more and more data across multiple platforms. As for the economic model, this has not been outlined yet. We will be exploring all methods that fall in line with creating smart economies, including 2 token models.
What are ring signatures in cryptography? How do they work?We are already expanding Western marketing, primarily in the US. More focus on this will come soon after the main chain.
Most of us understand the interoperability of the network. What is a specific use case for Hcash? What role will Hcash have in the network? What makes it a requirement for interoperability? If someone has Bitcoin and wants to convert it to Ethereum using Hcash’s network wallet, is Hcash used as a fee for that conversion?At this time, we are exploring more efficient transaction schemes, such as bulletproofs. Bulletproofs can reduce the computational power needed for privatized/ anonymous transactions.
Here is an analogy. You walk into an arcade with 20 different machines. Each of these machines takes a different token, but you only have coins that operate with one of these machines. This would be the type of solution we hope to provide. Fees can be paid with Hcash. In the future we can explore taking fees in other denominations as well. More of this would be explained in detail with our yellow paper and economic model.
Are you willing to divulge how many apps you have in development for the Hcash main chain?Main chain release is mid-February, but we are aiming for launch on February 15th.
What is the Martian’s current relationship to Hcash? Is he still part of its team?The primary focus right now is to improve the stability of the Hcash main chain. This will ensure successful launches in the future for developers on our side DAG EVM.
Will the main chain go up according to schedule? Are there any problems with Hcash? The specialist sales team was made up of shareholders/ investors, right?The Hcash team is currently located on Earth. The last I heard the Martian was returning to Mars.
Is the code on GitHub all original? Are all developments executed on GitHub? Why is there so little original code? There are so few modifications. I also noticed there are remarkably few references to the code. Most of them are from documents that have been updated.Provided no unforeseen circumstances, we are on schedule for the main chain release. There are roadblocks and disconnects with every project. This is a new world of technology we are exploring. I think the team you may be referring to is the Hcash Foundation themselves. A lot of the Western marketing and development is being handled by the Nucleus Team.
What is scope of the Hcash R&D team?Many engineers have worked to contribute to the blockchain community over the years. We are taking advantage of the hard work and research that has been done while also making our own meaningful contributions for others to use in their code. It is important to acknowledge the contributions of others. The work completed by Decred in particular has allowed us to grow. Now we will have our chance to contribute back to them and others with our post quantum signature scheme and NG implementation. There are advantages of having similar projects that people don’t realize. For example, after our main chain launch we can explore assisting with development on the Lightning Network. As for GitHub, you will see activity increase when the main chain launches.
Hcash is currently collaborating with three universities. Shanghai Jiao Tong University has been working on the main chain quantum resistance. What are the main responsibilities of the other two universities?To assess, research and develop cutting edge decentralized consensus mechanisms and applications.
The Westerners working on Hcash don't seem very enthusiastic. They aren't following a lot of people on Twitter. Does the team have any clearer plans for increasing publicity?Building blockchain technology is a group effort. The other teams have also been researching other options for main chains, smart contracts etc. For example, Dr. Joseph Liu from Monash University is working on ring signature schemes to continue our research and development into privatized transactions. We are looking forward to taking the best efforts of all teams and bringing them to the blockchain communities at large, starting with the post quantum implementation from LoCCS at Shanghai Jiao Tong University.
Are there plans to get onto more exchanges such as Bittrex?The Westerners are primarily focused on the technology, development, and creating more content. The community management will be increasing transparency and activity in time. More Western marketing can be done after the launch of the main chain.
When will quantum resistant technology be implemented into Hcash? Where can we follow the developments being made and is there anywhere we can go to participate in the project?When moon? We are constantly considering all options to allow users to access Hcash. Currently we are listed amongst some of the top exchanges like Binance and growing exchanges like KuCoin.
Where do you download the wallet? How do you mine?Quantum resistant technology is available now on GitHub at https://github.com/HcashOrg/hcashd and will be available for use outside of the testing environment when the main chain launches in the middle of February.
When will Hshares swap Hcash? Can you announce a general time?The wallet for the new main chain can be found on GitHub at https://github.com/HcashOrg/hcashwallet. You can mine on the new main chain by joining a pool or using the hcashd node to solo-mine.
Will there be an address mapping when Hshares swaps to Hcash like there was with EOS? What other kind of mechanism will be used for the coin swap?Hshares can be redeemed for Hcash after the main chain launches in the middle of February. Announcements will be made regarding how and where to swap your Hshares for Hcash.
When will the main chain that can support smart contracts go online? When will tokenization for Hcash take place?A snapshot of Hshares will be included in the Genesis (first) block of Hcash’s launch to allow users to convert their Hshares into Hcash. An announcement will be made as to how, when and where conversions will take place.
There aren't many updates on GitHub and there aren’t many contributors. What kind of coordination is going on with the development team?Smart contract functionality will be available when our side DAG launches. Users, businesses and developers will be able to build dApps, launch tokens and more. We are making sure the main chain is a stable foundation before adding our DAG to the Hcash ecosystem.
Based on what I've been reading, Shanghai Jiao Tong University is mainly responsible for the main chain portion of the project. How is their team doing? How many research students in their labs are helping them?Both the Nucleus Team and members of Shanghai Jiao Tong University LoCCS are working together to finalize testing. Updates are being made to our GitHub at https://github.com/HcashOrg/hcashd.
Can you confirm that the main chain will finally go up in mid-February? Is it just a hypothetical date and then a further delay?Shanghai Jiao Tong is responsible for building and launching the new main chain. Their team there has been doing a great job with research and development and we look forward to seeing more of their work. The Nucleus Team is currently working with them to finish testing. After testing, the Nucleus team will focus on the future development of the project including our side DAG. I do not know the size of their team as we have not visited their lab.
What is the status of these interoperability features? When is the main chain going online?The primary responsibility is to make sure the main chain is stable and secure so that it can be used as the foundation to add other important features to the Hcash ecosystem, like smart contracts and hidden transactions. Everyone is working very hard to hit the target release date of mid-February. We are planning on mid-February for the launch unless anything unexpected comes up.
Won’t zero knowledge proofs conflict with the system’s throughput?Main chain will be released mid-February. The interoperability features depend on the stability of the network. Our side DAG EVM will be the quickest addition to the Hcash ecosystem that will allow for ETH interoperability. Lightning Network on the main chain will require further research and development.
We are currently working on more uncommon implementations of zero proof knowledge, such as bulletproofs that allow for efficient transaction speeds. We can also achieve higher throughput with our side DAG.
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