blockchain

Everyone must always watch movies. Some movie tickets are cheaper, while others are expensive. At this time, did you think that if I could participate in the movie business, how good would it be? ethereum movie venture Ethereum Movie Venture la tx ), which also adopted ERC-20 Ethereum blockchain agreement currently). In 2018, when the movie "The Pitts Circus" was released, it was necessary to use the platform's movie token , Ethereum Movie Venture token (EMV) to watch the movie. Subsequently, the blockchain company Consesys teamed up with Braid the movie and plans to launch feature films

http://www.infoq.com/cn/news/2018/07/blockchain-BPM?utm_source=notification_email&utm_campaign=notifications&utm_medium=link&utm_content=content_in_followed_topic&utm_term=daily https://www.infoq.com/news/2018/06/blockchain-BPM https://www.hyperledger.org/blog/2018/06/12/how-blockchain-is-reinventing-business-process-management https://www.ibm.com/developerworks/cloud/library/cl-use-blockchain-bpm-manage-legal-documents-letter-of-credit/index.html https://www.ibm.com/developerworks/cloud/library/cl-enable-bpm-business-processes-to-react-to-blockchain-events/index.html https://ecmarchitect.com

背景 “区块链”是什么？ 关于该应用程序 1.将事务存储到区块中 2.让区块不可更改 3.链接区块 清单 1. 我们的 Blockchain 类的初始结构 这是我们的 Blockchain 类： 4.实现工作量证明算法 请注意，没有明确的逻辑来快速确定随机数；只能通过暴力破解。 5.将区块添加到链中 挖矿 OK,基本工作已经完成了。 6.创建接口 7.建立共识和去中心化 8.构建应用程序 9.运行应用程序 完工了！ 尝试发布一些数据，您会看到类似下图的结果： 验证事务 结束 原文链接：https://wwww.ibm.com/developerworks/cn/cloud/library/cl-develop-blockchain-app-in-python/index.htm 文章来源: 区块链现在是凉了吗？好像越来越少人学了！刚会开发一个的区块链

When you create a hyperledger fabric network, you define organizations, orderers and peers in crypto-config.yaml and configtx.yaml . But how do you add a new organization or a new peer to an existing organization in a network that is already setup? Run cryptogen and configtxgen pointing to config files that contain only the new organizations/peers? Re-generate everything? Abdul Wahab You can achieve this by generating the crypto material (using cryptogen extends ) for the new peer, spawning the new peer and joining that peer to the existing channel on the network to sync-up. You can find the

In the week 1 lecture of the bitcoin coursera course, there is a discussion of the 3 properties of a cryptographic hash functions: Collision-resistance: A hash function H is said to be collision resistant if it is infeasible to find two values, x and y , such that x != y , yet H(x)= H(y). Hiding: A hash function H is hiding if: when a secret value r is chosen from a probability distribution that has high entropy, then given H(r ‖ x) it is infeasible to find x. ‖ means concatenation of two strings. Puzzle friendliness. A hash function H is said to be puzzle-friendly if for every possible n-bit

During trying to achieve the performance with Hyperledger Fabric which IBM team reported in their article Hyperledger Fabric: A Distributed Operating System for Permissioned Blockchains , I faced some problems and errors. I collected all useful information and want to share it with the HF community. Also, I have a couple of questions to the Fabric developers about its performance. Target description Hyperledger Fabric v1.1.0 network deployed using Cello on four c5.9xlarge (36vCPU) aws instances: { fabric001: { cas: [], peers: ["anchor@peer1st.main"], orderers: ["orderer1st.orderer"],

As the developers are constantly using different network protocols of blockchain such as Hyperledger, multichain, Ethereum, Corda, and others. Community will appreciate if the developers & blockchain enthusiasts can pour in some key differences between various types of blockchains as mentioned above. Thanks ! christo4ferris This is a good question, though not one easily addressed with a simple answer. As @Mat0 commented above, one difference is the approaches that the various platforms are using to achieve consensus. Some use proof of work (PoW), others use variants of byzantine fault tolerant

Git's internal data structure is a tree of data objects, wherein each objects only points to its predecessor. Each data block is hashed. Modifying (bit error or attack) an intermediate block will be noticed when the saved hash und the actual hash deviate. How is this concept different from block chain? Git is not listed as an example of block chains, but at least in summaries, both data structure descriptions look alike: data block, single direction reverse linking, hashes, ...). So where is the difference, that Git isn't called a block chain? git is not an example of blockchain technology for