Non-Fungible Token (NFT): Overview, Evaluation, Opportunities

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Non-Fungible Token (NFT): Overview, Evaluation, Opportunities ( non-fungible-token-nft-overview-evaluation-opportunities )

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4 Fig. 2: NFT-related Token Standards Security Evaluation - - - - - Availability.TheNFTsystemnevergoesdown.Alternatively,allthetokens and issued NFTs are always available to sell and buy. Tamper-resistance. The NFT metadata and its trading records are persis- tently stored and cannot be manipulated once the transactions are deemed as confirmed. Usability.EveryNFThasthemostup-to-dateownershipinformation,which is user-friendly and information-clearly. Atomicity. Trading NFTs can be completed in one atomic, consistent, iso- lated, and durable (ACID) transaction. The NFTs can run in the same shared execution state. Tradability. Every NFTs and its corresponding products can be arbitrarily traded and exchanged. An NFT system is a combination technology that consists of blockchain, storage and web application. Security evaluation on the NFT system is challenging since each component may become an attacking interface that makes the whole system really vulnerable against the attacker. Thus, we adopt the STRIDE threat and risk evaluation [102], which covers all security aspects of a system: authenticity, integrity, non-repudiability, availability and access control. We investigate the potential security issues and propose some of the corresponding defense measures to adress these issues (see Table 1). Spoofing. Spoofing is the ability to impersonate another entity (for example, another person or computer) on the system, which corresponds to authenticity. When a user interacts to mint or sells the NFTs, an malicious attacker may ex- ploit authentication vulnerabilities or steal the user’s private key to transfer the ownership of NFTs illegally. Thus, we recommend to have a formal verification 8

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