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Что такое Cordentity? [Перевод статьи]

Блог компании Luxoft Open source *
Cordentity — это приложение Corda (CorDapp) позволяющее использовать возможности технологии Self Sovereign Identity (SSI) другим CorDapps. Другими словами, Cordentity = Corda + Identity.

Мы рады объявить, что теперь Cordentity является проектом Hyperledger Labs с открытым исходным кодом.

Мы разработали Cordentity, чтобы привнести в Corda возможности SSI, реализованные в Hyperledger Indy. Технология Hyperledger Indy основана на двух важных концепциях: DID (децентрализованные идентификаторы) и ABC (учетные данные на основе атрибутов или проверяемые утверждения).
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Всего голосов 18: ↑18 и ↓0 +18
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DPKI: Addressing the Disadvantages of Centralized PKI by Means of Blockchain

Блог компании ENCRY Децентрализованные сети Информационная безопасность *Криптография *Сетевые технологии *


Digital certificates are one of the most commonly known auxiliary tools that help protect data across public networks. However, the key disadvantage of this technology is also commonly known: users are forced to implicitly trust certification authorities which issue digital certificates. Andrey Chmora, Technology and Innovations Director at ENCRY, suggested a new approach for building a Public Key Infrastructure (PKI) to eliminate the existing disadvantages using the distributed ledger (blockchain) technology.
Let's begin with the basics.
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Всего голосов 4: ↑3 и ↓1 +2
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Tutorial For Creating Blockchain Solution on Hyperledger Composer

Децентрализованные сети Анализ и проектирование систем *Разработка мобильных приложений *Дизайн мобильных приложений *


Due to modern business demands, IBM joined hands with other companies to develop an open-source business blockchain network called Hyperledger Fabric project that is touching the sky. Due to modular architecture, digital keys, and on-demand data retrieval, hyperledger fabric is regarded as the base for the world’s future modular architecture blockchain-based apps. Further benefits of Hyperledger Fabric are given below to facilitate your interpretation.
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Всего голосов 7: ↑6 и ↓1 +5
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How to Write a Smart Contract with Python on Ontology? Part 1: the Blockchain & Block API

Python *Распределённые системы *Криптовалюты
Из песочницы
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This is an official tutorial published earlier on Ontology Medium blog
Excited to publish it for Habr readers. Feel free to ask any related questions and suggest a better format for tutorial materials

Foreword


In this article, we will begin to introduce the smart contract API of Ontology. The Ontology’s smart contract API is divided into 7 modules:


In this article, we will introduce the Blockchain & Block API, which is the most basic part of the Ontology smart contract system. The Blockchain API supports basic blockchain query operations, such as obtaining the current block height, whereas the Block API supports basic block query operations, such as querying the number of transactions for a given block.

Let’s get started!

First, create a new contract in SmartX and then follow the instructions below.

1. How to Use Blockchain API


References to smart contract functions are identical to Python’s references. Developers can introduce the appropriate functions as needed. For example, the following statement introduces GetHeight, the function to get the current block height, and GetHeader, the function to get the block header.
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Всего голосов 20: ↑18 и ↓2 +16
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How to Write a Smart Contract with Python on Ontology? Part 3: Runtime API

Криптография *Python *Программирование *DevOps *Криптовалюты
Tutorial
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Introduction


Earlier, I have introduced the Ontology Smart Contract in
Part 1: Blockchain & Block API and
Part 2: Storage API
Now when you have an idea about how to call the relevant API for persistent storage when developing Python smart contract on Ontology, let’s go on to Runtime API (Contract Execution API). The Runtime API has 8 related APIs that provide common interfaces for contract execution and help developers get, convert, and validate data. Here’s a brief description of these 8 APIs:
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How to Write a Smart Contract with Python on Ontology? Part 4: Native API

Криптография *Python *DevOps *Распределённые системы *Криптовалюты
Tutorial
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Earlier, I have introduced the Ontology Smart Contract in
Part 1: Blockchain & Block API and
Part 2: Storage API
Part 3: Runtime API
Today, let’s talk about how to invoke an Ontology native smart contract through the Native API. One of the most typical functions of invoking native contract is asset transfer.
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Всего голосов 5: ↑5 и ↓0 +5
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PKI Decentralization: Proposed Approaches to Security Improvement

Децентрализованные сети Информационная безопасность *Криптография *Сетевые технологии *
The practical means of applying public key cryptography to secure network communications were introduced by Loren Kohnfelder in his MIT S.B. (BSCSE) thesis written in May 1978. After that, the public key infrastructure (PKI) has gone through several iterations of changes and updates, but it still preserves its traditional methodology. PKI requires implicit trust from a single entity or entities chain called a certificate authority (CA). This approach has led to a breakdown in confidence. However, through the years, having one root entity to control the way public key certificates are issued has shown that it can cause major complications with transparency and security.

In this article, we will once again dive deeper into the problems of PKI and consider the solutions being developed that can overcome existing shortcomings.
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Всего голосов 3: ↑3 и ↓0 +3
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Blockchain Is Changing The Way Rail Industry Works

Распределённые системы *IT-компании
Из песочницы
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Railways had made our transportation very easy since 1830 when the first railway began in England. From 1830 to 2020, the development in the railways has been quite significant. The concept of blockchain is expanding widely; hence the public interests are also growing on a vast scale. Major enthusiasts about blockchain are the investors and businessmen who wish for transparency and equity in the transaction. Now since blockchain is no more just a concept its application in railways is expected to smoothen the transportation.
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Всего голосов 3: ↑2 и ↓1 +1
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Как не создать с нуля криптовалюту за 3 года

Node.JS *Криптовалюты
🔥 Технотекст 2020
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В этой статье я опишу то, как я один написал криптовалюту с нуля, какие интересные технологии я оттуда вынес, с каким опытом ушел и что произошло потом. Это не туториал, а просто описание происходящих событий, но, если будет желание — могу написать пару статей на тему что и почему, хотя не уверен что это кому-нибудь нужно. В конце статьи будут выводы, к которым я пришел после 3х лет создания.
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Всего голосов 7: ↑5 и ↓2 +3
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Top 10 Blockchain Development Companies To Partner With In 2020-21

Разработка мобильных приложений *Разработка под Android *Развитие стартапа Офисы IT-компаний Криптовалюты
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Global Blockchain solutions spending is expected to surpass $15.9 billion in 2023. At the same time, this expenditure was $1.5 billion in 2018. Indeed, this is a huge influx in global spending, which depicts how companies will be investing more in blockchain solutions and blockchain-based mobile apps.

In this group, the major contribution will be seen from industries including finance, banking, healthcare, agriculture, and more. Amidst, outsourcing Blockchain development companies will also gain prominent attention.

If you are thinking about having Blockchain integration within your business solution, you must be having several questions in your mind, such as: what are the benefits of blockchain? Which are the best companies to hire? And more.
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Всего голосов 1: ↑0 и ↓1 -1
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5 Thought-Provoking Use Cases Of Blockchain In Diverse Industries

Децентрализованные сети Криптография *Habr Инфографика Криптовалюты

Blockchain is a decentralized technology that maintains a record of all transactions occurring over a peer-to-peer network. Due to Blockchain's several different high-level use cases, numerous industries described Blockchain as the 'magic beans.' 

Blockchains store the record in a decentralized system that is interconnected. This technology lessens vulnerability and enhances transparency in all industrial sectors as information is stored digitally, and it does not have any centralized point to carry out the transactions.

Do You Know?

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Всего голосов 1: ↑0 и ↓1 -1
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