Die Allgegenwรคrtigkeit des Internets macht es zu einer wertvollen Datenquelle. Produkte wie Twitter und Google Trends implementieren APIs die es erlauben diese Daten zu nรผtzen. Da diese zwei Produkte groรe Mengen von Nutzerdaten speichern, kann man Sie nรผtzen um Vorhersagen รผber das Benutzerverhalten in bestimmten Bereichen zu machen. In dieser Arbeit, beschreiben und implementieren wir statistische Method um Vorhersagen รผber den Bitcoin Wechselkurs mittels Stimmungsanalyse, der Frequenz von Tweets รผber Bitcoin und dem Interessenniveau zum Suchbegriff Bitcoin. Weiters zeigen wir wie das stรผndliche Handelsvolumen von Bitcoin mittels der stรผndlichen Rate von Tweets รผber Bitcoin und Google Trends Daten vorhergesagt werden kann. In dieser Arbeit analysieren wir Daten aus dem Zeitraum Juli 2018 bis August 2018, d.h. zwei Monate. Erstens benรผtzen wir die stรผndlichen Informationen รผber Tweet Stimmung, Tweet Frequenz und Google Suchdaten รผber Bitcoin um eine kausale Verbindung zwischen diesen Daten und dem aktuellen Preis von Bitcoin. Zweitens entwickeln wir ein vektorautoregressives Modell (VAR) dass erfolgreich den Bitcoin Wechselkurs und das Bitcoin Handelsvolumen vorhersagt. Weiters, verwenden wir zwei unterschiedliche Algorithmen, SentiStrength and Stanford Core NLP, um Stimmungsinformation zu erhalten. Wir zeigen dass mit dem SentiStrength Algorithmus welcher fรผr kurze Nachrichten wie Tweets geeignet ist unser Modell bessere Resultate erzielt. Spezifisch, zeigen wir dass unser Modell wenn kombiniert mit SentiStrength eine Genauigkeit von 63% fรผr Vorhersagen bezรผglich dem Anstieg und Abstieg des Bitcoin Wechselkurses aufweist. Auf der anderen Seite, wenn man unser Modell mit Stanford Core NLP kombiniert erhalten wir eine Genauigkeit von 59%. Drittens, benutzen wir die Tweet-Frequenz und Suchinformationen um das Bitcoin Handelsvolumen mit einem mittleren quadratischen Fehler von 172.76 vorherzusagen. Zusammenfassend, zeigen wir in dieser Arbeit dass Informationen von Twitter und Google Trends sehr hilfreich sind wenn es um die Vorhersage zwei wichtiger Bitcoin Eigenschaften, Wechselkurs und Handelsvolumen, geht.
Samer Ajour El Zein et al. Samer Ajour El Zein et al., TJPRC
A sea of doubt surrounds the technology that promises to completely change the economic paradigm, Bitcoin. A 365degree turn to the monetary system that promises an intangible currency, with a peer to peer (P2P) trust system, without intermediaries and based in a revolutionary technology, Blockchain.
Adjunct Professor, Hoseo Univ., 212-1103, 346-2, Sangdo-ro, Dongjak-gu, Seoul, Republic of Korea, Joon-Hee Kim
Blockchain technology is a scientific and technological project that countries around the world have been paying close attention to and researched and developed in recent years, and it is one of the most popular technologies in the world. Blockchain is a kind of bookkeeping technology that is jointly maintained by multiple parties, uses cryptography to ensure transmission and access security, can achieve consistent data storage, is difficult to tamper with, and prevents denial. It is also called distributed ledger technology and has distributed credibility. Technical characteristics such as not easy to be tampered with, and multi-party maintenance. The new infrastructure of chain network collaboration will use network identification as a key digital resource as a breakthrough point to promote the application and development of blockchain and realize the engine role of new infrastructure. Through the collaborative development of blockchain and the industrial Internet, the new infrastructure of chain network collaboration is committed to building a national-level distributed trusted application innovation carrier. Provide a unified identity authentication mechanism, object identification mechanism, and value exchange mechanism for digital applications to reduce the cost of using digital technology.
As the value of technical information increases, hacking attacks are trying to steal technical information through hacking. Recently, hacking of cryptocurrency exchanges is much easier to monetize than existing technical information, making it a major attack target for hackers. In the case of technical information, it is required to seize the technical information and sell it to the black market for cashing.In the case of cryptocurrency, most hacking attacks are concentrated on cryptocurrency exchanges because it is easy to cash out and not easy to track when successful hacking. Although technology cannot be hacked, cryptocurrency transactions traded on cryptocurrency exchanges are not recorded on the blockchain which is simply internal exchanges, so insiders may manipulate the quotes and leave gaps or leak out. Therefore, this research analyzes the recent hacking attacks of cryptocurrency exchanges and proposes solutions to secure cryptocurrency trading.
<em>Any number of gadgets can be associated with a Wi-Fi remotely. Anybody inside scope of the Wi-Fi can endeavour to get to the system. Due to this, Wi-Fi is progressively powerless against assaults. Consequently, client touchy data is at the danger of being misused. The clientsโ security and security can be ensured by unknown verification. When they use the hotspots that are very easy to access to everybody, privacy plays an important role. The existing solutions which will validate the users but do not take the responsibilities of the users or they are always dependent on intermediators. The latest development of or concept of colored coins and coin shuffle can be used to protect the users who are connected to the network without compromising or leaking any information. The bitcoin blockchain is very impressive and robust that will help to manage the user information and also very helpful to determine the possession of the users framework.</em>
Due to the anonymity of cyrptocurrencies, a new method of money laundering that hides the source of illegal funds has emerged by utilizing cyrptocurrencies. In addition, there are cases such as exchange hacks or ICO frauds in which cryptocurrencies themselves are dirty money. These illegal actions are criticized as problems of cryptocurrencies, and these problems must be tackled for the sake of development and commercialization of cryptocurrencies. Although Ethereum is a public blockchain that is completely open anyone, it does not provide the necessary tools such as query language or client tools needed, therefore requiring further methods to process and utilize data efficiently. This paper aims to explore the money laundering that is happening in Ethereum. In addition, it suggests the ways to sort Ethereum accounts suspected of being used for money laundering and the strategy to implement them using Graph Database.
In this paper, we present a certificate management platform for performance assessment during recruitment using blockchain. Applicants are awarded certificates according to a predetermined level of progress based on their performances. All certificates are stored on a recruitment management platform that serves as an environment for storing and presenting all awarded certificates. The hashed information of all the certificates are stored in the blockchain, and once stored, the contents cannot be tampered with. Therefore, anyone can check the validity of the certificates using this blockchain. Our proposed platform will be useful for recruitment and application management, career management, and personal history maintenance.
The purpose of this study, is create a challenge and discussion concerning the existence of information about the Bitcoin price and return, which suggests the relationship of information and the strong performance it. The information trends are available at different time periods and the summary data related to the statistical descriptions for the price and return index are also discussed. In this paper we show a significant correlation between the price trend and return in the Bitcoin that has been confirmed by various statistical methodology. Using statistical tests and reviewing trends and relationships between the variables, planning can be done to invest in it and its performance or inefficiency can be tested. The results of this research shows a significant and positive relationship between the price and return of Bitcoin.
Over the past few years, the importance of improving the product distribution structure has increased worldwide. Therefore, distribution prices are now disclosed and product information is shared with consumers. However, distribution channels are complex and supply chain management (SCM) is autonomously executed in each company. For this reason, it has been frequently pointed out that the distribution process is not transparent and the distribution margin is high. In this paper, we propose a system that guarantees the transparency of the product distribution structure by applying blockchain and smart contracts to the price-tracking portion of supply chain management systems. This approach allows companies to track their trades by enhancing transparency in the SCM, thereby discouraging companies from pursuing excessive profits. In addition, companies can cut management costs by automatically storing distribution details in a blockchain network and managing information more securely.
Purpose - The purpose of this study is to subdivide trade transaction-centered structure in a logistics/distribution industry system to apply blockchain, to establish and resolve with which types of technology, and to provide policy direction of government institution and technology to apply blockchain in this kind of industry. Research design, data, and methodology - This study was conducted with previous researches centered on cases applied in various industry sectors on the basis of blockchain technology. Results - General fields of blockchain application include digital contents distribution, IoT platform, e-Commerce, real-estate transaction, decentralized app. development(storage), certification service, smart contract, P2P network infrastructure, publication/storage of public documents, smart voting, money exchange, payment/settlement, banking security platform, actual asset storage, stock transaction and crowd funding. Blockchain is being applied in various fields home and abroad and its application cases can be explained in the banking industry, public sector, e-Commerce, medical industry, distribution and supply chain management, copyright protection. As examined in the blockchain application cases, it is expected to establish blockchain that can secure safety through distributed ledger in trade transaction because blockchain is established and applied in various sectors of industries home and abroad. Parties concerned of trade transaction can secure visibility even in interrupted specific section when they provide it as a base for distributed ledger application in trade and establish trade transaction model by applying blockchain. In case of interrupted specific section by using distributed ledger, blockchain model of trade transaction needs to be formed to make it possible for parties concerned involved in trade transaction to secure visibility and real-time tracking. Additionally, management should be possible from the time of contract until payment, freight transfer to buyers through land, air and maritime transportation. Conclusions - In order to boost blockchain-based logistics/distribution industry, the government, institutionally, needs to back up adding legal plan of shipping, logistics and distribution, reviewing standardization of electronic switching system and coming up with blockchain-based industrial road maps. In addition, the government, technologically, has to support R&D for integration with other high technology, standardization of distribution industry's blockchain technology and manpower training to expand technology development.