Knowledge

The concept of the “metaverse” may be quite new to many people. However, there are many metaverse projects out there that can create a life-changing opportunity. Metaverse and crypto are coming together to develop the future of the digital world in the areas of...

If we discuss the topic of which technology makes business operations more convenient and efficient, Salesforce cannot be ignored. A cloud computing technology that is popular and growing strongly in recent years, bringing a positive influence to the way many businesses operate and handle....

An introduction to Quantum Computing Quantum computing is an emerging field of advanced computer science that exploits the unique properties of quantum mechanics to solve problems that are beyond the capabilities of even the most powerful classical supercomputer. The field of quantum computing encompasses...

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...

In the era of data explosion, manufacturing enterprises and smart cities require data processing solutions that are faster, more secure, and more accurate than ever before. Edge Computing—data processing at the source—combined with Digital Twin—a digital model that simulates real-world systems—is emerging as a...

Live streaming app is emerging as a new application on social media that helps many people who can contact, and interact with each other without worrying about geographic location, time, and more. In this article, we will introduce to you the concept of live...

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...

Play to earn has been one of the trending keywords from mid-2021. This trend has made the cryptocurrency market more exciting than before with the appearance of a series of game projects. What makes this model attractive? Let’s find out through the following article!...

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....

The software development life cycle is the process of planning, designing, developing, and implementing high-quality software at the lowest cost. To achieve this goal, developers need to use models to create software to match customer requirements. In today’s technology world, there are a variety...

The migration from COBOL to Java is a crucial step for businesses to modernize their legacy systems. This process is not just about code translation; it also involves choosing the right approach, ensuring data security, and making a smooth transfer without affecting operations. Here’s...

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 Embedded system is a very familiar term for programmers. In recent times, when IoT is becoming more and more developed, Embedded system is being used more and more. So what is the Embedded systems? In the following article, BAP Software will help readers...

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...

Recently, with the continuous development of information technology, manual testing has gradually been replaced by automated testing. Thanks to automated testing technology, the software testing process as well as the Automation Tester’s work becomes more efficient. However, there are still many people who do...

Businesses want to develop SaaS but often face the challenge: which company to choose — one that is both reputable and budget-friendly? In reality, the market has hundreds of service providers, but not all of them have the capabilities to be a long-term partner....

Sorry, this entry is only available in 日本語. 前回の記事で ブロックチェーン はネットワークにいる全員で台帳を共有していると言いましたね。 参考：中学生でもわかる！ブロックチェーンの仕組み それでは「悪い人が誰かの台帳にアクセスして書き換えることができるのでは？」と疑問に思う方もいるでしょう。もちろん ブロックチェーン にはデータの不正利用を防ぐ仕組みがあります。今回は不正を防ぐための３つの暗号技術について初心者にも分かりやすく説明します。 １．特定の人にしか見られないようにする暗号技術：公開鍵暗号化方式  ブロックチェーン に用いられる１つ目の暗号技術は公開鍵暗号化方式です。この技術によって、データを盗み見られたり、書き換えられたりすることを防いでいます。鍵による暗号化は共通鍵と公開鍵があります。 ブロックチェーン に用いられている公開鍵暗号化方式をより理解するために、まずは従来の方式である共通鍵暗号化について説明します。 共通鍵暗号化方式は二人が共通の鍵を持っていて、データを暗号化、復号化する方法です。これは、データを送りたい相手に事前に共通鍵を渡しておく必要があるのですが、どうやって共通鍵を渡すかが難しい点です。 情報が漏洩しやすいインターネット上で共通鍵を渡すことは危険であるため、厳重に管理されたルートで相手に渡す必要があります。また、第三者に共通鍵が流出した場合、簡単にデータを開封されてしまいます。このような鍵配送問題を解決したのが公開鍵暗号化方式です。 公開鍵暗号化方式の最大の特徴は暗号化するための鍵と復号化するための鍵が異なるということです。受信者はあらかじめ暗号化用の鍵を送信者に渡しておきます（相手に渡すため公開鍵と言われています）。 そして、暗号化された情報を復号化するための鍵は自分だけが持っておきます（自分だけが持っておくので秘密鍵と言われています）。 そして、送信者は事前に渡された公開鍵でデータを暗号化しておくります。この場合、もしデータが盗まれたとしても秘密鍵がなければ第三者は暗号文を読みとくことができません。 このデータを読むことが出来るのは秘密鍵を持っている受信者のみです。公開鍵暗号化方式は共通鍵暗号化方式の鍵配送問題を解決した暗号方式であり、情報漏洩を防ぐことができます。 しかし、注意すべき点は秘密鍵の管理です。秘密鍵が流出すると情報を盗まれる可能性があるため、秘密鍵の管理は慎重に行う必要があります。 ２．本人を証明するためのしくみ：電子署名 ブロックチェーンに用いられる２つ目の暗号技術は電子署名です。これは紙の文書におけるサインの役割を果たすもので、ネット上のなりすまし対策のために作られました。 電子署名は上記で説明した秘密鍵と公開鍵を利用していますが、注意すべき点は、電子署名と公開鍵暗号方式では鍵の役割が違うことです。 ＜公開鍵暗号方式＞ 秘密鍵：暗号文を復号化する。開鍵：平文を暗号化する ＜電子署名＞ 秘密鍵：平文に署名をする　公開鍵：署名が正しいか検証する では、電子署名は具体的にどのようにして行われるのでしょうか？メールを例にして説明します。 まず、一郎さんはまい子さんにメールを送るとき、通常のメッセージ（平文）と同時に、秘密鍵によって暗号化したメッセージ（暗号文）も同時に送ります。この過程で、送信するデータを秘密鍵を用いて暗号化することを電子署名といいます。 暗号化されたメッセージを受け取ったまい子さんは、誰の公開鍵で読めるか試してみます。すると、太郎さんの公開鍵で暗号文を読むことができました。さらに、解いた暗号文と平文を比べると一致していました。 こうして、確かに一郎さん本人からのメールだということが分かりました。このように、電子署名を用いると本人が送ったことを証明することができます。 ３．データを瞬時に照合できるしくみ：ハッシュ関数 ブロックチェーンに用いられる３つ目の暗号技術はハッシュ関数です。ハッシュ関数とは、どんな値を入力しても２５６ビットの長さの文字列が出てくる関数のことです。 どんなに長いまたは短い文字列を入力しても、一定の長さのハッシュ値が出てきます。また、入力値が一文字違うだけで、全く異なる文字列がでてきます。 ハッシュ関数の重要な特徴は一方向性です。データをハッシュ化するのは簡単ですが、ハッシュ化された結果から元のデータを推測することは不可能となっています。では、ハッシュ関数はどのように活用されているのでしょうか？ 例えば、オンラインで音楽ファイルなどのデータをダウンロードするときにハッシュ関数が役に立ちます。ダウンロード中にデータが破損する可能性がありますが、ダウンロード後に膨大なデータを隅々までチェックして破損しているかどうか調べるのは大変な作業です。 その際、ダウンロードしたデータのハッシュ値と、ダウンロード元のサイトに載っているハッシュ値を比較します。比較した結果、２つのハッシュ値が一致していれば、正常にダウンロードされたことが確認できます。...

In recent times, when technology has become more and more popular and applied in many different fields, Salesforce is also a name that has become familiar to many people. However, Salesforce and its application in enterprise human resource management are not well understood by...

Giới thiệu tổng quan về sử dụng AI trong kinh doanh Nếu bạn đã từng thử phát triển một chiến lược kinh doanh, bạn sẽ biết nó khó khăn đến mức nào. Rất nhiều tầm nhìn, tư duy thông minh và chú ý đến...

Horenso is one of the basic soft skills for employees. New employees often go through a Horenso training and learning process. They also need to firmly grasp the principles to ensure effective communication within the company. Many foreigners working at Japanese companies often have...

1. What is Mixed Reality (MR)? Mixed Reality is the next wave of computing, following the arrival of mainframes, personal computers (PCs), and smartphones. Mixed Reality is becoming more and more popular with both consumers and businesses. It frees us from screen-based experiences, providing...

In the age of modern technology, GenAI or generative AI stands out as one of the most trendy technologies. From enhancing the efficiency and accuracy of current AI systems to providing fresh prospects for the creative industry, Generative AI is generating a buzz. 1....

The ERP (Enterprise Resource Planning) system is a comprehensive management solution that integrates finance, procurement, inventory, production, sales, human resources, and more into a single platform. This allows information to be unified, transparent, and updated in real time, helping organizations control operations, make accurate...

Mobile App Testing is the process of testing a mobile application for its usability before it is publicly released. Mobile App Testing helps verify whether the application meets technical requirements or not. With modern advanced technology, smartphones have been born, promoting the development of...

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...

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....

Cybersecurity is a set of measures, technologies, and processes designed to protect computer systems, networks, and data from attacks, unauthorized access, damage, or information theft. 1. Introducing the importance of cybersecurity today In an increasingly connected world, cybersecurity has become the foundation of our...

 Big Data and Cloud Computing have emerged as important technologies to penetrate the trend of the IT industry in recent years. While each technology has its merits, many businesses have combined them to reap even more benefits. If you are looking to explore how...

In the context of rapid digital transformation and the increasing demand for energy, energy companies are facing numerous challenges. Managing energy consumption, optimizing processes, and ensuring transparency in transactions have become essential factors in business operations. In particular, the complexity of monitoring and analyzing...

Starlink is a satellite network providing Internet services developed by the American aerospace company SpaceX. As of June 2024, there are more than 6,000 satellites, accounting for more than half of all satellites in operation. Starlink is a megaconstellation or satellite Internet constellation, with...