Mobile communications offer a wide variety of services to people. All mobile subscribers can use a mobile device to access various resources and conduct their business anytime from anywhere. This feature has contributed greatly to the rapid development of mobile commerce.In fact, the Personal Trusted Device (PTD, such as PDA or mobile phone) lacks of computing resources has become a problem in mobile commerce development. In this paper, we overcome the limited computation power of mobile device and involve a trusted proxy server to coordinate transactions such that the important computation requirements can still be accomplished. In this paper, we propose a server-aided signature scheme for mobile commerce. We base on the Diffie et al. scheme and involve the one-time password mechanism to establish session key in advance, and then download the initial parameters into the mobile devices as the communication parameters between the mobile user and the proxy server. The proposed scheme satisfies the issues of security, non-repudiation, fairness, anonymity, simplicity, and mobility.
With the advent of the information age, data storage has not only developed from paper information systems to electronic information system storage but also extended to cloud database storage methods. To date, we can see the application of big data and cloud in various fields and levels, which makes the induction, arrangement, transmission, and exchange of data easier and faster. The electronic and systematization of patient medical records in the medical environment is an example. The use of electronic medical records can help to improve the quality of medical care, reduce duplication of treatment, and reduce the waste of examination resources. It has many advantages, but also many risks. Medical institutions may abuse electronic medical data without the consent of patients leading to the leakage of patient privacy data and causing serious social impact. Therefore, this study proposes a medical record exchange and sharing mechanism based on the Hyperledger blockchain architecture combined with proxy re-encryption. When pharmacists need to obtain medical records for related research, patients can decide whether to share medical records, and hospitals can also revoke the access rights of pharmacists at any time to achieve more private, secure, and convenient sharing of medical records. The proposed scheme meets various blockchain security requirements, and the BAN (Burrows–Abadi–Needham) logic proof model is applied to evaluate the correctness of the proposed scheme. The proposed scheme performs well in terms of computational and communication costs.
In recent years, due to the slowdown of the global economy and the instability of the stock market and real estate market, the art market has gradually become the third-largest investment market after the former two. As more and more funds flow into the art market, the two seemingly unrelated industries, art, and finance have increasingly close cooperation due to the growing prosperity of the art market. As a very important part of the process of art financialization, the development of art banks has also received extensive attention from all walks of life. In addition, blockchain, as a technology to jointly maintain reliable databases through trustlessness and decentralization, has grown rapidly in recent years, and is gradually applied in various fields. The advantages of blockchain technology are decentralization, anonymity, immutability, and traceability of stored information. The proposed scheme applies the characteristics of blockchain technology to Art Bank’s art rental system, and will have the following advantages: the use of Hyperledger technology, various art banks being merged into an alliance, and information among alliance members being shared, which is convenient for tenants to comprehensively query a single item. Using blockchain technology, in an environment where there is no central authority, under the premise of preventing the tampering of artwork-related information, ensures that the detailed information of the artwork is shared. Traditional leasing agreements can be compiled into smart contract leasing contracts to automatically run and manipulate data. The proposed protocol satisfies the following security requirements: identities’ mutual authentication, non-repudiation between every two parties, and other major security requirements based on blockchain. When a dispute arises, our proposed scheme also has an arbitration mechanism to clarify responsibilities.
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