Knowledge

Non-fungible tokens (NFTs) have become one of the most popular items in the cryptocurrency market in recent years. Whether you are an innovator or just curious about this new world, there is no doubt that the NFT can be a great asset that you...

Application software has become the backbone of our economy, the dominant industry in our era. Many companies providing software solutions were born. If you are interested in software companies or want to learn more about software companies in Vietnam, this article is for you....

Compiled based on clear evaluation criteria such as technological capability, real-world implementation experience, team expertise, and customer satisfaction. This list not only provides a comprehensive snapshot of the digital transformation market in Vietnam and globally, but also serves as a reliable reference for businesses...

I. What is Microsoft Power Automate? Previously known as Microsoft Flow, Microsoft Power Automate is cloud-based software that lets staff members build and automate jobs and processes across various apps, regardless of complexity, without help. Flows are automated process systems. The user defines what...

Future Blockchain will become the core infrastructure for global digital transactions, replacing intermediaries with a transparent and secure decentralized system. It will redefine finance, contracts, voting, and personal data while accelerating the “Everything-as-a-Service” (XaaS) trend in the digital era. 1. How does the future...

Artificial Intelligence (AI), Machine Learning (ML), and Deep Learning (DL) are three concepts that frequently appear in the digital era, yet many people still confuse them. In essence, AI is a broad concept that refers to systems capable of simulating human intelligence. Machine Learning...

The metaverse race is heating up as more and more big projects appear. If you also feel this heat and want to find a metaverse game that is right for you. The following article will introduce some notable projects that you can refer to. ...

I. What is Sustainable Technology? Sustainable technology is an umbrella term that describes innovation that takes natural resources into account and promotes economic and social development. The objective of these technologies is to significantly reduce environmental and ecological risks and create a sustainable product....

One of the hottest topics in the cryptocurrency industry during the second half of 2021 so far is GameFi. If you are a newbie and are about to enter this hot and potential market. Do not ignore the common terms in the article below...

LlamaIndex was presented as an orchestration or data architecture that makes building LLM applications easier in the first section of the paper. Llamaindex github facilitates the integration of private data into LLM for the purpose of knowledge production and reasoning by offering data-augmented implementation....

1/ The Situation of the Software development in Hanoi Software development in Hanoi is experiencing a period of strong growth. The published figures were announced at the end of 2022. The IT industry in general or specifically the software sector in Vietnam always maintains...

In the era of Industry 4.0, asset digitalization has emerged as a strategic solution for businesses and investors to optimize asset value with transparency and efficiency. The rapid development of blockchain technology has unlocked the potential to transform physical and digital assets into tradeable,...

I. What is “SaaS”? “SaaS” stands for Software as a Service. It refers to the use of applications in the form of cloud services. Based on cloud technology, SaaS is a service that provides software to end-users via the Internet. Traditionally, in order to...

The stability of IT systems now directly determines a company’s business performance, where any disruption can lead to significant losses. This is where O&M Services (Operation & Maintenance Services) become a strategic factor, helping enterprises not only maintain stable system operations but also optimize...

1. Analyzing Salesforce cost for implementation  Implementing Salesforce can have 2 types of fees including installation and license costs. For Salesforce, you don’t need to pay the initial cost for installing the tool, so the cost of installation depends on the business’s deployment requirements....

Sorry, this entry is only available in 日本語. 前回の記事で、 ブロックチェーンは３つの暗号技術を用いて不正を防いでいると説明しましたね。 参考：ブロックチェーンの不正を防ぐ3つの暗号技術 今回はその暗号技術を用いてブロックチェーン構造 がどのような構造になっているかを説明します。この記事を読めばきっとブロックチェーンという名称の由来がわかるでしょう。 １．仮想通貨はただのデータにすぎない  ブロックチェーンの構造を説明する前に、仮想通貨について触れたいと思います。本来、仮想通貨はただのデータに過ぎません。あなたが仮想通貨を誰かに送金するとき、「×時△分、○○にいくら払いました。」と台帳に記録されるだけで、その通貨は目に見えるものでも触れられるものでもありません。 このように、仮想通貨は台帳上の記録に過ぎないものですが、みんなが価値があると思うから通貨になりました。しかし、仮想通貨のようなデータが通貨として認められるためには必要な条件があります。 ”データが通貨として成り立つための３条件 送信者が誰か特定できる。 送信内容が途中で改ざんされない。 送信者が後で自分が送信したことを否定できない。 引用元：玉蔵（2017）『社会を根底から変えるシェアリングエコノミーの衝撃！仮想通貨ブロックチェーン＆プログラミング入門』株式会社ヒカルランド”  ブロックチェーン はその構造によって、３つの条件を満たすことができます。 ２．台帳が改ざんされないためのブロックチェーンの構造 （１）ブロックには前の取引情報も含まれる ブロックチェーン は前回の取引情報が次の取引情報に含まれる構造になっています。では、一郎さんからまい子さんへ送金する場合の取引記録を見てみましょう。 下記は一郎さんからまい子さんに渡されるブロックの中に含まれるものです。 前回までの取引記録のハッシュ値 取引内容「一郎⇒まい子　３ＢＴＣ」 まい子の公開鍵 一郎の署名 このように取引記録がひとつのブロックとしてまとめられて、次の取引に鎖状につながっていくことがブロックチェーンという名称の由来です。では、なぜ前回の取引記録まで次のブロックに送られるのでしょうか？ それは、ひとつのコインを改ざんして2人に送るといった「二重支払い」を防ぐためです。前回の取引記録をブロックに含めることによって、コインががどこからきたものなのかを明確にすることができます。これにより存在しないコインが送金されることを防いでいます。 これは二重支払いのような改ざんが起こってもすぐに分かるしくみです。ブロックBが改ざんされてブロックB’が作られたとしても、後に続くB’以降の全てのブロックのハッシュ値が全く違うものになる為、改ざんされてもすぐに分かるような構造になっています。 （２）改ざんを難しくするナンスの役割 それでは改ざんしたブロック以降を全て書き換えれば良いのでは？と思うでしょう。しかし、それを阻止する仕組みが存在します。それは、ナンスと呼ばれています。まず、実際の取引に使われているブロックのハッシュ値を見てましょう。 ここであることに気づきませんか？ ハッシュ値の先頭は０が並んでいますね。本来、ハッシュ化した場合、ランダムな数字が並ぶためこのようなことは起こりません。これは０が並ぶように意図的にデータに何らかの文字列を足しているのです。ここで足される文字列がナンスです。 上の図のように、ブロックをハッシュ化する際、ハッシュ値に０が並ぶまで何度もナンスの文字列を変えて計算を繰り返します。 このように適当なナンスを見つける作業をマイニングといいます。ナンスを見つけた人には台帳に書き込む権利が与えられ、報酬として12.5BTC（※）もらえる仕組みになっています。 ちなみに、マイニング（mining）の由来は、計算処理の報酬として仮想通貨が支払われることが、鉱山から金や銀を採掘するイメージと似ている為です。 マイニングはとても大変な作業ですが、報酬を得るために世界中で計算機を回して行われています。そして、ビットコインはこのマイニングからしか生まれないようになっています。マイニングはビットコインをはじめとする様々な通貨で採用されている方法です。 2019/9/5現在　1BTC＝約110万円のため12.5BTC＝約1400万円 （3）一番長いものが正式なブロックになる...

The Waterfall software model was first introduced in 1970 by Winston Royce. The Waterfall model consists of simple and separate stages, so Waterfall used to be very popular. In spite of the fact that this model has been replaced by others, it still follows...

Progressive Web Apps (PWAs) is one of the new generation software, helping to increase user experience and save costs for businesses. Progressive Web Apps are commonly applied in many fields such as e-commerce and Marketing. 1. What are Progressive Web Apps? Progressive Web Apps...

Society 5.0 is a concept proposed by the Japanese government and various governmental agencies worldwide, referring to a new, highly digitalized society. By promoting the idea of Society 5.0, countries aim to build a smarter society through the utilization of big data collected from...

Java system development is so famous in IT sector, and it is applied from web, apps, or even game. In this article, we will introduce to you about recommended 5 Java system development companies in Japan that your business can consider when having intention...

What is OutSystems Platform? OutSystems is a low-code app development platform that lets you build apps quickly. The platform is primarily meant for developers and business users who want to accelerate the development process by saving significant time on front-end and back-end system integration,...

While Narrow AI has become common in everyday life, Artificial General Intelligence (AGI) represents the pinnacle that the tech world is striving to achieve. AGI refers to machines that not only perform programmed tasks but also possess the ability to think, learn, and adapt...

What is AI? AI stands for Artificial Intelligence. It consists of advanced machines and algorithms that simulate human intelligence. These machines typically perform tasks that require a human element, such as: Voice identification. Language translation. Visual perception. AI mainly relies on deep learning, neural...

Salesforce Campaign is an interesting feature that supports business so much in various activities including Marketing and Sales for interacting with Leads, Prospects and customers. In this article, we will provide information about the Salesforce campaign for you to understand more. Let’s start. 1....

There are many people who still look for virtual currency wallet information to start their investment with coins. This article will help them explain from the concept to mechanism, and types of them. 1. What is virtual currency wallet? Its nature is a place to...

In today’s highly competitive market, AR/XR and the Metaverse are no longer merely entertainment technologies—they have become strategic levers that help logistics enterprises optimize operations while enhancing customer experience. From warehouse visualization and supply chain simulation to creating interactive virtual shopping environments, these technologies...

SAP system is the system used by a lot of enterprises in the current business process. In the process of using the SAP system, it is indispensable for the modules and the SAP S/4HANA migration process to serve the business process. So what is...

NFT Game is probably a familiar name in the gaming industry as well as the cryptocurrency market. If you are a gamer, you must have experienced many interesting NFT games. But if you are new to this market, you probably still don’t fully understand...

SaaS (Software-as-a-Service) is becoming a dominant model in the era of digital transformation. Beyond saving infrastructure costs, SaaS brings flexible scalability, easy maintenance, and personalized user experiences. This article will help you master the effective SaaS development process and introduce you to partnership solutions...

Scale Agile Solutions is a methodology that expands Agile across the entire organization, aligning strategy, operations, and technology to accelerate digital transformation effectively. Digital transformation requires businesses to adapt quickly and continuously innovate. To achieve this at scale, many forward-thinking organizations have adopted Scale...