Knowledge

1/ Overview of the software development in Ho Chi Minh City When mentioning Ho Chi Minh City (HCMC), people often immediately think of the key economic center of the country, a place of constant innovation and development. In that overall picture, the software development...

When it comes to Web app or mobile application development, developers cannot ignore the Real-time updating aspect. This element uses time data to provide users with useful information, supporting users during remote work and other social activities. Real-time updating helps users update news and...

In the past 2 to 3 years, NFT has become popular globally and in many fields. Gaming is one of the prominent industries that have adopted NFT and created the NFT Game trend. It’s hard to deny its attraction when it can both help...

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...

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 Spring Boot? Which Spring Boot should businesses choose? 1. What is Spring Boot? Spring Boot is a framework built on the Spring MVC platform, a famous framework in Java. Spring is designed based on 2 principles including: Inversion of Control (IOC)...

Finding out various technological solutions is to satisfy businesses’ goals such as increasing sales, completing the perfect workflow, or managing Marketing activities,.. And Salesforce is the best choice for you. But “How to use Salesforce” is a problem that businesses ask much on the...

While Artificial General Intelligence (AGI) remains a future ambition, Narrow AI (ANI) – Artificial Narrow Intelligence – is the present-day technology that’s delivering tangible value every day. So what exactly is Narrow AI, and how can businesses leverage it effectively? This article will provide...

Virtual Reality (VR) is a technology that simulates a vivid 3D environment, allowing users to interact within a digital space as if they were in the real world. With the support of devices like VR headsets, users can “immerse” themselves in realistic experiences for...

1. Introduction: The Growing Need for IT Service Connectivity in the Digital Era As digital transformation becomes an inevitable trend globally, the demand for high-quality IT solutions is increasingly vital for businesses. From software development and system integration to advanced technologies like AI, Big...

Today’s IT systems are under increasing pressure from complex and constantly evolving cybersecurity threats. A single minor vulnerability can become the root cause of operational disruption, financial loss, and serious damage to a company’s reputation. Therefore, System Security Maintenance is no longer merely a...

The NFT Play to Earn Game segment is extremely active in recent times when helping players entertain and generate income. Are you new to the cryptocurrency market? Do you want to join the NFT gaming trend but are afraid to invest capital when starting?...

Java is a programming language used in the development of web applications, desktop applications, and Android applications. This article is for those who want to develop web applications using Java or those who have started learning Java but still don’t clearly understand how Java...

Is it too late to learn about blockchain now? With the constant development of new blockchain technology, along with great untapped potential lies ahead. This is still the right time to explore blockchain. If you are a beginner and want to learn about blockchain...

Digital Twin – real-time digital simulation technology – is becoming a vital piece in enterprises’ digital transformation journey. This article compiles the list of the Top Trusted Digital Twin Technology Companies in 2025, selected based on multiple criteria. The list serves as a valuable...

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...

In recent years, the IT industry has seen a shift from servers to the cloud, making cloud adoption an inevitable choice for businesses. Among various cloud platforms, Salesforce boasts the No.1 market share in sales and customer service cloud applications worldwide. In this article,...

Salesforce is the leading name when it comes to customer relationship management solutions. Each CRM software has its characteristics. So what are the outstanding features of Salesforce that make the difference and the choice of so many businesses? Let’s find out through the following...

2025 marks the explosive rise of artificial intelligence in daily work. From content creation, design, coding to project management – everything can now be assisted by AI. This article compiles the best AI tools suitable for office workers, marketers, and developers, helping you increase...

Over the past decade, the use of Big Data has grown to the point where it can touches nearly every aspect of consumers’ normal lifestyles and shopping habits. But not many people realize the importance as well as the applications that Big Data brings...

VR Development (Virtual Reality) is the process of creating immersive 3D virtual environments that users can interact with through specialized devices. This technology is becoming an inevitable trend as more and more businesses recognize the potential of VR in training, sales, customer service, and...

What is Blockchain? Many people know it as a technology that underpins Bitcoin. But blockchain won’t just stop at Bitcoin or cryptocurrencies. This technology is expected to be applied more widely in many areas of life. So what does the future of blockchain look...

1. Overview of the Software development in Hue The Information Technology (IT) industry in Hue is becoming one of the key economic sectors of Thua Thien Hue province. Regarding achievements, software development in Hue has reaped a local revenue of more than 10,000 billion...

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....

Automation technology is a phrase that is mentioned a lot in the field of industry, production, and distribution of goods today. Automation was born to help enterprises optimize production processes, reduce costs and increase profits. So what is automation technology? What are the advantages...

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...

Nowsaday, most businesses use many different types of applications to improve customer service quality and increase competitiveness. However, slow application performance can affect business operations. So how can we effectively manage application performance? What software performance management tools can we turn to to solve...

Digital transformation is the process of applying technology to all aspects of a business to enhance efficiency, accelerate innovation, and gain competitive advantage. In the digital economy, it is not just a trend but a vital key to survival—helping businesses adapt, grow sustainably, and...

In the era of digital transformation, automation is no longer a choice. Moving beyond RPA or workflow automation, the concept of Hyperautomation has emerged as a major breakthrough — integrating Artificial Intelligence (AI), Robotic Process Automation (RPA), Machine Learning (ML), and various other advanced...

Minimum Viable Product (MVP) is an important element of business strategy, especially for startups. But what exactly does an MVP consist of, and why is it such a widely adopted technique among businesses today? Let’s dive into the details to better understand the importance...