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.
Bitcoin News Bitcoin Exchange Guide News Team-December 10, 2018 0 Last week, Binance CEO, ZHAO Changpeng aka CZ tweeted a question asking what people think will be the next bull run. The tweet read, “What... Bitcoin: Transaction script and the Script language. The bitcoin transaction script language is called Script and the UTXO lock and unlock scripts are written in this language: when a transaction is validated the unlock scripts of each input are executed together with the corresponding block script to check whether it meets the spending conditions. O Bitcoin usa o algoritmo de hash SHA-256, RIPEMD160, e a criptografia de Algoritmo de Assinatura Digital de Curva Elíptica (ECDSA). Muitos acreditam que um ataque de um computador quântico poderia quebrar a ECDSA, mas que SHA-256 e a RIPEMD160 permaneceriam imunes. What is a private key exactly? Private keys are based on secret 256-bit long string of letters and numbers which are randomly selected when you create a bitcoin wallet. This address enables you to send the bitcoins to a recipients destination address. The private keys themselves are not shared with anyone else exact for the sender or creator, as this may allow others to have control over funds ... /r/Bitcoin is primarily for news and discussion. Please avoid repetition — /r/bitcoin is a subreddit devoted to new information and discussion about Bitcoin and its ecosystem. New merchants are welcome to announce their services for Bitcoin, but after those have been announced they are no longer news and should not be re-posted. Gli algoritmi utilizzati per creare un indirizzo bitcoin da una chiave pubblica sono Secure Hash Algorithm (SHA) e RACE Integrity Primitives Evaluation Message Digest (RIPEMD), in particolare SHA256 e RIPEMD160. Dalla chiave pubblica K calcoliamo prima l’hash SHA256 e in seguito l’hash RIPEMD160, generando un numero a 160-bit (20-byte). The algorithms used to create a bitcoin address from a public key are Secure Hash Algorithm (SHA) and RACE Integrity Primitives Evaluation Message Digest (RIPEMD), in particular, SHA256 and RIPEMD160. From the public key K it is calculated first the hash SHA256 and then the hash RIPEMD160, generating a 160-bit number (20-byte). Doch wird bei Bitcoin jeder Public Key noch einmal durch eine Hashfunktion (RIPEMD160) verschlüsselt, was ihn auf eine Schlüssellänge von 2 160 komprimiert. Es gehen also Informationen verloren. Daraus folgt, dass mehrere Privatekeys auf eine BTC-Adresse passen können. Zur Verdeutlichung nehmen wir an, dass zu jeder BTC-Adresse gleich viele Private Keys passen. Die Annahme ist nötig weil ... When sender gets a bitcoin address, their wallet converts it from base58check to hex, checks the checksum and removes both the Version-Byte and checksum to get RIPEMD160(SHA256(pubkey)) - value in step 03. Then it proceeds with scriptPubKey verification. Bitcoin also has other advanced address types. P2SH addresses, for example, allow for multi-signature transactions. Similarly, other altcoins also employ the identical SHA-26, ECDSA, SHA-256 and RIPEMD160 protocols in order to generate addresses. For the purposes of understanding an blockchain address, while techies might squeal if one dares ...
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