Home » Author Archives: Tamer Sameeh

Author Archives: Tamer Sameeh

Legal Aspects of DAO (Decentralized Autonomous Organization)

Decentralized autonomous organization (DAO) represents an innovative means for organization of a network of decentralized users for taking common decisions and engaging in smart contracts. Any user can submit a smart contract proposal to the DAO. Every user can vote for or against any given smart contract. The DAO program will execute the decision voted for by the majority. The ... Read More »

A Comprehensive Privacy Analysis of Tor Hidden Services

Tor is one of the most popular darknets, which is known for its high levels of anonymity. Even though Tor’s protocol and its relay security have been thoroughly studied, there is currently no detailed analysis of the framework and privacy of hidden web services on this widely used darknet. To address this, a group of researchers formulated a specialized analysis ... Read More »

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Exploratory Data Analysis for Tor Marketplaces – The Drugs’ Case

The world of anonymous marketplaces represents a novel channel for black markets, which offer a wide variety of illegal merchandize. For most marketplaces on the darknet, the overall incidence of sales is still not comparable with the sales incidence of similar physical markets. Nevertheless, given the fact that it reflects an essential trade channel, offering opportunities to new as well ... Read More »

An Application That Converts National Fiat Currencies To Blockchain Based Cryptocurrencies

The high security levels offered by cryptocurrencies, via the blockchain technology, offer an ideal financial ecosystem for minting national currencies. A recently published paper introduced an innovative application that utilizes the blockchain technology to transform fiat money into a cryptocurrency; ether. This technology can become a part of a much bigger system, so that, after travelling outside his/her country, a ... Read More »

Blocktix : Decentralized Network for Event Hosting & Ticketing Using Ethereum’s Blockchain

Blocktix is a novel, decentralized platform for ticket distribution and event hosting. The platform operates via Ethereum’s smart contracts, which enable verification of authentic tickets rendering it almost impossible to counterfeit them. Blocktix is aimed at providing a decentralized network for distribution and sales of tickets. Individuals as well as companies can buy and sell tickets via means of cryptographic ... Read More »

Public Consensus Networks & Secret Management : From Access Control to Ransomware

The advent of bitcoin has introduced the world to a new class of decentralized networks. Referred to as “consensus networks”, such systems, as bitcoin’s and Ethereum’s blockchain, deploy highly distributed volunteer-run networks to implement public rules that are responsible for managing access to various resources. Bitcoin’s network utilizes consensus to apply monetary transaction rules. Nevertheless, more recently consensus based systems ... Read More »

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A Public Transport Ticketing System That Accepts Bitcoin

In many parts of the world today, public transportation is faced by the problem of seemingly inconvenient ticketing processes. Bitcoin is a decentralized currency that can easily solve such problem. A group of developers from Liverpool University proposed a novel ticketing system for public transportation, which is comprised of an automatic ticketing vending machine that supports bitcoin payments. An essential ... Read More »

Trust Is Risk – Bitcoin Based Reputation System for Online Decentralized Marketplaces

Online marketplaces can be either centralized or decentralized. Ebay is one of the most popular centralized online marketplaces, while OpenBazaar is by far the most popular decentralized online marketplace. Online marketplaces rely, in a way or another, on creating a reputation system for both sellers and buyers, which is a common denominator between centralized and decentralized marketplaces. In most cases, ... Read More »

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Modular Stacking and Bitcoin’s Evolution

Throughout the past few years, bitcoin has offered us a simple, inexpensive and highly secure way for sending payments to anyone, anywhere in the world. Moreover, being open source software, bitcoin is inherently versatile as it is structured in the form of open ended modular stacks whose capabilities are boosted by the functionalities innately provided by the uppermost layers , ... Read More »

The Blockchain Technology, Smart Contracts and Legal Procedures

A significant sum of money is spent every year in various litigation processes. Technically speaking, a significant portion of litigations can be prevented from even emerging provided that contracts, laws and policies are properly objectified. Today, the interpretation of legislations, policies and contracts yields a great deal of confusion and a myriad of ambiguities, which further complicates the process of ... Read More »

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Hallex – A Decentralized Cryptocurrency Exchange Via Ethereum’s Turing-Complete Blockchain

A large number of cryptocurrency exchanges have experienced cyberattacks that led to the loss millions of US Dollars worth of bitcoins and altcoins, during the past 4 years. In most cases, most cryptocurrency exchanges utilize centralized servers, where trading takes place, to store and manage digital assets, which renders them highly valuable targets for hackers. Accordingly, decentralized exchanges represent ideal ... Read More »

Assessment of Legislations Banning Psycho-active Substances On Their Availability on the Deep Web

Psychoactive substances represent drugs that were formulated to mimic the effects of conventional street drugs such as cannabis, ecstasy and cocaine, while remaining legal substances; thus, they were previously called “legal highs”. Psychoactive substances began to appear in UK’s drug scene between 2008 and 2009. These substances fall into one of four main classes: 1. Synthetic cannabinoids: the effects of ... Read More »