Cybercriminals use cryptocurrency Bitcoin since it come to existence. It is an ideal, anonymous platform for global money transfer. Bitcoin does not have authority or central issuer, so there is no way to steal it from its holder. It is therefore used by the criminal groups around the world. This article aims to increase the reader’s knowledge on new technologies of money transfer. This knowledge will help the reader to improve the quality of personal security on the Internet. In effect it will reduce the potential risk of various types of frauds and other cybercrimes.
Bitcoins and their use are a very actual issue, especially with high popularity and high cost of Bitcoins. Number of Bitcoin’s transactions increasing day to day. But many individuals and business owners do not understand what is Bitcoin, how it works and how could it be used in business. This article discusses the nature of Bitcoin, a decentralized, anonymous and largely unregulated virtual currency, its legal status and use in business. The article includes examination of both advantages and disadvantages of Bitcoin and international regulation of legal status and taxation of this currency.
This paper focuses on the evolution of cryptocurrencies. It traces the history of early cryptography, the ‘cypherpunk’ movement, and how the work of some cyber libertarians and cryptographers enabled the emergence of popular cryptocurrencies. The paper then focuses on Bitcoin. It delves into the technology behind the Bitcoin architecture and shows how exactly this technology works. The paper then does an analysis of security and regulatory considerations that affect the growth of Bitcoin-based businesses. The paper concludes with some suggestions for future work in the area.
Feroz Ahmad Ahmad, Prashant Kumar, Gulshan Shrivastava, Med Salim Bouhlel
ON 12 JANUARY 2009 a pseudonymous entity signed a transaction that instructed a distributed network to transfer a small amount of digital currency to Hal Finney, one ofthe key figures of the cypherpunk movement. After a few minutes, the transaction was recorded on a distributed public ledger, permanently updating the balance ofbothparties. This transaction— the first Bitcoin transaction—marked the beginning of a new era of decentralized payment systems, ushering in a variety of financial Services that do not depend on any centralized clearinghouse or other financial middleman. Bitcoin is regarded by many as a powerful technological innovation that could disrupt many sectors, in the realm of finance and beyond. But the underlying technology on which the network operates, the Bitcoin blockchain can do much more than that. Just as the internet did in the early-1990s, blockchain technology carries with it a whole new range of promises concerning how decentralization can support and promote individual freedoms and autonomy. Blockchain proponents believe that Bitcoin and other cryptocurrency platforms will revolutionize mechanisms of value exchange in the same way that the internet transformed information sharing, by providing a platform for people to exchange digital resources, in a secure and decentralized manner without the need to rely on any intermediary or trusted authority. But this revolutionary potential also carries with it serious implications for censorship, intellectual property, and the regulated flow of information. A blockchain is a decentralized database of transactions maintained by a distributed network of computers, which all contribute to the verification and the validation of transactions. Once accepted, these transactions are recorded inside a “block” of transactions, which incorporates a reference to previous blocks. This creates a long chain of blocks—a “blockchain”—that stores the history of all transactions in a chronological order. Every block contains information about a particular set of transactions, a reference to the preceding block in the blockchain, and the answer to a complex mathematical puzzle that is used to validate the data associated with that block. A copy of the blockchain is stored on every computer in the network, making it virtually impossible for anyone unilaterally to modify the data stored on this decentralized database: if anyone tries to modify any transaction the fraud will be immediately detected by all other network participants.
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Blockchain Technology Applications and Security
Advanced Steganography and Watermarking Techniques
Purpose – The purpose of the article is to look closely at the phenomenon of the cryptocurrencies such as and bitcoin to identify their potential vulnerabilities to money laundering and financing of terrorism. It also explores their specific characteristics relevant to ML/FT risks. Design/methodology/approach – Using digicash and bitcoin protocols as primary cases for centralized and decentralized cryptocurrencies we analyse their characteristics against cash and cashless payments. We also draw on “bundle of attributes” that may define their attractiveness for common public or criminals. Findings – Our research shows that characteristics of the cryptocurrencies are unlikely to make them popular among the consumers, as demand for anonymity seems to be overrated. Cryptocurrencies can also be classified as payment instrument rather than private currencies; therefore their embededdness in the financial system minimizes the ML/FT risks. Research limitations/implications – Some decentralized cryptocurrencies operate within informal communities. Therefore, relations within these communities are constantly evolving and need to be monitored further. Practical implications – The paper provides an insight into the mechanics and classification of cryptocurrencies as payment instruments. Place of cryptocurrencies within the broader payment ecosystem defines their potential vulnerabilities to being abused by the criminals. Originality/value – The paper fills the gap in research on cryptocurrencies as payment instruments rather than private currencies and also provides an overview of their relevance for the Anti-money laundering and combating financing of terrorism (AML/CFT) regime.
The new world of mobile devices offers reasonable likelihood that virtual currency will prevail on a global scale. Currently, the bitcoin crypto-currency model appears to be a forerunner. Bitcoin, a highly disruptive technology, has both supporters and detractors. Nonetheless, in concert with other trends, some form of virtual currency, even if a successor to bitcoin, appears to have a path forward. Virtual currencies will likely gain in stature as other novel, unspecified, and disruptive innovations take hold in a world of increasingly autonomous systems. This department is part of a special issue on mobile commerce.
Hari Krishnan Ramachandran, Sai Saketh, Marichetty Venkata Teja Vaibhav
Cryptocurrency, a form of digital currency that has an open and decentralized system and uses cryptography to enhance security and control the creation of new units, is touted to be the next step from conventional monetary transactions. Many Cryptocurrencies exist today, with Bitcoin being the most prominent of them. Cryptocurrencies are generated by mining, as a fee for validating any transaction. The rate of generating hashes, which validate any transaction, has been increased by the use of specialized machine such as ASICs, running complex hashing algorithms like SHA-256, thereby leading to faster generation of Cryptocurrencies. With more people venturing into the world of virtual currency, generating hashes for this validation has become far more complex over the years, with miners having to invest huge sums of money on employing and maintaining multiple high performance ASICs. This paper throws light on the nuances of Cryptocurrency mining process, the issues of traditional mining machines and the implication of incorporating cloud technology to current mining infrastructure.
This thesis illustrates forensic research work on Bitcoin, an innovative Internet based global transaction system that attracts ascending popularity during the recent few years. As an open, public and scalable distributed payment system, Bitcoin brings forward significant economic and technological impact to our world. Meanwhile, a new notion of virtual currency, "Bitcoin" comes into existence such that Bitcoin currency can be "mined" from all over world complying with specific algorithms. Mined bit "coins" has practical monetary values that turn the Bitcoin system into a digital currency circulation system. Due to Bitcoin's decentralized semantics, Bitcoin transaction and currency are not subject to control and censorship from any single authority. Therefore, Bitcoin brings out various security concerns about its application as a long-term reliable system.\nThe research in the thesis focuses on forensic study on Bitcoin. It covers experimental study on the Bitcoin network as a peer-to-peer system and a graph-based forensic approach against Bitcoin's transaction data. Major contributions include network data evaluation and transaction history analysis. In case of forensic investigation is needed against criminal incidents such as fraud, false transactions and money theft, which are commonly seen in commonly used digital payment systems, the research provides a guidance of efficient information collection and framework of evidence data processing and extraction
During 2013, the U.S. Treasury Department evoked the first use of the 2001 Patriot Act to exclude virtual currency provider Liberty Reserve from the U.S. financial system. This article will discuss: the regulation of virtual currencies; cybercrimes and payment systems; darknets, Tor and the “deep web”; Bitcoin; Liberty Reserve; Silk Road and Mt. Gox. Virtual currencies have quickly become a reality, gaining significant traction in a very short period of time, and are evolving rapidly. Virtual currencies present particularly difficult law enforcement challenges because of their: ability to transcend national borders in the fraction of a second; unique jurisdictional issues; and anonymity due to encryption. Due primarily to their anonymous characteristic, virtual currencies have been linked to numerous types of crimes, including facilitating marketplaces for: assassins; attacks on businesses; child exploitation (including pornography); corporate espionage; counterfeit currencies; drugs; fake IDs and passports; high yield investment schemes (Ponzi schemes and other financial frauds); sexual exploitation; stolen credit cards and credit card numbers; and weapons. Innovation in the pace of development of new currencies and technologies continue to create ongoing challenges for responsible users of technology and regulators alike. While technological advances create great opportunities to improve the health, living conditions, and general wellbeing of mankind; new technologies also create great challenges for nation states.
The Bitcoin Market Potential Index conceptualizes and ranks the potential utility of bitcoin across 178 countries to show where the cryptocurrency has the greatest relative potential for adoption. The index utilizes a data set with 40 variables from the following areas: technology penetration, international remittances, inflation, informal economy, financial repression, financial crises (historical), and bitcoin penetration. Standardized and re-scaled country level data both indicate that Argentina and Sub-Saharan Africa are the country and region, respectively, where bitcoin has the greatest potential for adoption. It is argued that regulation could have an important effect on bitcoin adoption but that it should be excluded as an index variable for now due to insufficient data and uncertainty over its short-term directional impact and longer-term consequences.
The anonymity of Bitcoin prevents analysis of its users. We collect Google Trends data to examine determinants of interest in Bitcoin. Based on anecdotal evidence regarding Bitcoin users, we construct proxies for four possible clientele: computer programming enthusiasts, speculative investors, Libertarians and criminals. Computer programming and illegal activity search terms are positively correlated with Bitcoin interest, while Libertarian and investment terms are not.
Sarah Meiklejohn, Marjori Pomarole, Grant Jordan, Kirill Levchenko · 7 authors
Bitcoin is a purely online virtual currency, unbacked by either physical commodities or sovereign obligation; instead, it relies on a combination of cryptographic protection and a peer-to-peer protocol for witnessing settlements. Consequently, Bitcoin has the unintuitive property that while the ownership of money is implicitly anonymous, its flow is globally visible. In this paper we explore this unique characteristic further, using heuristic clustering to group Bitcoin wallets based on evidence of shared authority, and then using re-identification attacks (i.e., empirical purchasing of goods and services) to classify the operators of those clusters. From this analysis, we characterize longitudinal changes in the Bitcoin market, the stresses these changes are placing on the system, and the challenges for those seeking to use Bitcoin for criminal or fraudulent purposes at scale.
Many want to know what bitcoin is and how it works. But bitcoin is as complex as it is controversial, and relatively few have the technical background to understand it. In this paper, I offer an accessible on-ramp for understanding bitcoin in the form of a model. My model reveals both what bitcoin is and how it works. More specifically, it reveals that bitcoin is a fictional substance in a massively coauthored story on a network that automates and distributes jobs normally entrusted to centralized publishing institutions. My model therefore falsifies a popular view according to which each bitcoin is a chunk of code.
This article examines the use of Bitcoin in money remittance markets as a specific illustration of wider emerging regulatory issues relating to the use of cryptocurrencies. While there are many conceivable benefits of using Bitcoin for remittances, there are also many risks for users of these remittance services. This article adopts a user perspective to look at what the major concerns are and what existing protections may be available to persons using cryptocurrencies under New Zealand law through the example of using Bitcoin for remittance purposes. The article then summarises approaches taken by other jurisdictions before suggesting a specific regulatory approach to cryptocurrencies that New Zealand should consider adopting.
Central to Bitcoin is its independence from any institution or government, allowing anyone to engage in a direct transaction at a low cost. So, what exactly is it, and how does it work?