The procurement of goods determines the cost of business operations and the impact of corporate profits.For the purposes of Shandong Electric Power Company, with grid construction continued to increase efforts, gradua...The procurement of goods determines the cost of business operations and the impact of corporate profits.For the purposes of Shandong Electric Power Company, with grid construction continued to increase efforts, gradually increase the amount of investment in power grid construction.2013, Shandong Electric Power Company invested 360.5 billion yuan in fixed assets, an increase of 9%, in which grid investment 337.9 billion yuan,forecasting it will continue to increase in the coming years.How to strengthen procurement management is a top priority of Shandong Electric Power Enterprise Development,this paper conducted a systematic investigation and analysis in e-commerce companies in Shandong Power supplies procurement,comparing with the traditional procurement and e-commerce business processes,summarizing the problems and proposing strategies and suggestions for improvement,展开更多
Identity-based public cloud storage auditing schemes can check the integrity of cloud data, and reduce the complicated certificate management. In such a scheme, one Private Key Generator(PKG) is employed to authentica...Identity-based public cloud storage auditing schemes can check the integrity of cloud data, and reduce the complicated certificate management. In such a scheme, one Private Key Generator(PKG) is employed to authenticate the identity and generate private keys for all users, and one Third Party Auditor(TPA) is employed to by users to check the integrity of cloud data. This approach is undesirable for large-scale users since the PKG and the TPA might not be able to afford the heavy workload. To solve the problem, we give a hierarchical Private Key Generator structure for large-scale user groups, in which a root PKG delegates lower-level PKGs to generate private keys and authenticate identities. Based on the proposed structure, we propose an authorized identity-based public cloud storage auditing scheme, in which the lowest-level PKGs play the role of TPA, and only the authorized lowest-level PKGs can represent users in their domains to check cloud data's integrity. Furthermore, we give the formal security analysis and experimental results, which show that our proposed scheme is secure and efficient.展开更多
文摘The procurement of goods determines the cost of business operations and the impact of corporate profits.For the purposes of Shandong Electric Power Company, with grid construction continued to increase efforts, gradually increase the amount of investment in power grid construction.2013, Shandong Electric Power Company invested 360.5 billion yuan in fixed assets, an increase of 9%, in which grid investment 337.9 billion yuan,forecasting it will continue to increase in the coming years.How to strengthen procurement management is a top priority of Shandong Electric Power Enterprise Development,this paper conducted a systematic investigation and analysis in e-commerce companies in Shandong Power supplies procurement,comparing with the traditional procurement and e-commerce business processes,summarizing the problems and proposing strategies and suggestions for improvement,
基金supported by National Natural Science Foundation of China (No. 61572267, No. 61272425, No. 61402245)the Open Project of Co-Innovation Center for Information Supply & Assurance Technology, Anhui University+1 种基金the Open Project of the State Key Laboratory of Information Security,Institute of Information Engineering,Chinese Academy of Sciences(No.2017-MS-21, No.2016-MS-23)National Cryptography Development Fund of China (MMJJ20170118)
文摘Identity-based public cloud storage auditing schemes can check the integrity of cloud data, and reduce the complicated certificate management. In such a scheme, one Private Key Generator(PKG) is employed to authenticate the identity and generate private keys for all users, and one Third Party Auditor(TPA) is employed to by users to check the integrity of cloud data. This approach is undesirable for large-scale users since the PKG and the TPA might not be able to afford the heavy workload. To solve the problem, we give a hierarchical Private Key Generator structure for large-scale user groups, in which a root PKG delegates lower-level PKGs to generate private keys and authenticate identities. Based on the proposed structure, we propose an authorized identity-based public cloud storage auditing scheme, in which the lowest-level PKGs play the role of TPA, and only the authorized lowest-level PKGs can represent users in their domains to check cloud data's integrity. Furthermore, we give the formal security analysis and experimental results, which show that our proposed scheme is secure and efficient.
