Fake products are items that are marketed and sold as genuine, high-quality products but are counterfeit or low-quality knockoffs. These products are often designed to closely mimic the appearance and branding of the genuine product to deceive consumers into thinking they are purchasing the real thing. Fake products can range from clothing and accessories to electronics and other goods and can be found in a variety of settings, including online marketplaces and brick-and-mortar stores. Blockchain technology can be used to help detect fake products in a few different ways. One of the most common ways is through the use of smart contracts, which are self-executing contracts with the terms of the agreement between buyer and seller being directly written into lines of code. This allows for a high level of transparency and traceability in supply chain transactions, making it easier to identify and prevent the sale of fake products and the use of unique product identifiers, such as serial numbers or QR codes, that are recorded on the blockchain. This allows consumers to easily verify the authenticity of a product by scanning the code and checking it against the information recorded on the blockchain. In this study, we will use smart contracts to detect fake products and will evaluate based on Gas cost and ethers used for each implementation.

翻译：假冒产品是指那些被伪装成正品、高品质商品进行销售，实则为仿冒品或劣质仿制品的物品。这些产品通常精心模仿正品的外观和品牌标识，以欺骗消费者误以为购买到的是真品。假冒产品涵盖服装、配饰、电子产品乃至其他各类商品，常见于线上购物平台和实体店铺等不同销售渠道。区块链技术可通过多种方式协助识别假冒产品。其中最常见的方式之一是使用智能合约——这是一种自动执行的合约，买卖双方的协议条款直接以代码形式写入，从而在供应链交易中实现高度透明与可追溯性，便于识别并阻止假冒产品的销售。同时，区块链上记录的唯一产品标识符（如序列号或二维码）使消费者能够通过扫描编码并比对链上存储的信息，轻松验证产品真伪。在本研究中，我们将采用智能合约检测假冒产品，并根据各次实施过程中的Gas消耗和使用的以太币数量进行评估。