The article discusses the determinant factor of the function of the securities market at first and then proposes that the basic factor is the inherent need of social economic operation and development process itself. ...The article discusses the determinant factor of the function of the securities market at first and then proposes that the basic factor is the inherent need of social economic operation and development process itself. In addition, the primary factor of mature securities market is perfect and integrated function of the securities market. Afterwards, the article analyses the static and dynamic function of the securities market. At last, it probes into the government role in the securities market briefly and proposes that China needs to carry out the essential change on government role, market function location, development goal and the mode of securities market if the function of China's securities market is to be exerted properly.展开更多
The Chinese securities market has been developing gradually since the introduction of the economic reform and opening to the outside world. In 1981, our government issued national bonds in a bid to relieve the financi...The Chinese securities market has been developing gradually since the introduction of the economic reform and opening to the outside world. In 1981, our government issued national bonds in a bid to relieve the financial pressure. During the five years of 1981-1985, our country accumulated negotiable securities of RMB24.2 billion, mainly national bonds, accOunting for 97.9 percent of the total. Since 1986, the securities market has been developing towards diversification, along with increasing varieties. From 1986 to 1990,展开更多
At the present stage,with the continuous development of social economy and science and technology,China's financial and securities industry has gradually developed.As an important part of China's socialist eco...At the present stage,with the continuous development of social economy and science and technology,China's financial and securities industry has gradually developed.As an important part of China's socialist economic market,including the financial and securities industry,therefore,to a certain extent,the development of the financial securities industry has promoted the prosperity and development of China's economy.In other words,strengthening the management of financial securities market regulation can promote the sustainable development of the securities industry,thereby promoting the rapid development of China's economy.This paper mainly discusses and expounds some problems existing in the current process of financial securities market regulation,and proposes solutions to it,hoping to be helpful to the financial securities industry.展开更多
This paper is a continuation of our last paper [1] which describes the theory of Virt-BLP model. Based on Virt-BLP model,this paper implements a mandatory access control(MAC) framework applicable to multi-level securi...This paper is a continuation of our last paper [1] which describes the theory of Virt-BLP model. Based on Virt-BLP model,this paper implements a mandatory access control(MAC) framework applicable to multi-level security(MLS) in Xen. The Virt-BLP model is the theoretical basis of this MAC framework,and this MAC framework is the implementation of Virt-BLP model. Our last paper focuses on Virt-BLP model,while this paper concentrates on the design and implementation of MAC framework. For there is no MAC framework applicable to MLS in virtual machine system at present,our MAC framework fills the blank by applying Virt-BLP model to Xen,which is better than current researches to guarantee the security of communication between virtual machines(VMs) . The experimental results show that our MAC framework is effective to manage the communication between VMs.展开更多
Traditional multi-level security(MLS)systems have the defect of centralizing authorized facilities,which is difficult to meet the security requirements of modern distributed peer-to-peer network architecture.Blockchai...Traditional multi-level security(MLS)systems have the defect of centralizing authorized facilities,which is difficult to meet the security requirements of modern distributed peer-to-peer network architecture.Blockchain is widely used in the field of access control with its decentralization,traceability and non-defective modification.Combining the blockchain technology and the Bell-LaPadula model,we propose a new access control model,named BCBLPM,for MLS environment.The“multi-chain”blockchain architecture is used for dividing resources into isolated access domains,providing a fine-grained data protection mechanism.The access control policies are implemented by smart contracts deployed in each access domain,so that the side chains of different access domains storage access records from outside and maintain the integrity of the records.Finally,we implement the BC-BLPM prototype system using the Hyperledger Fabric.The experimental and analytical results show that the model can adapt well to the needs of multi-level security environment,and it has the feasibility of application in actual scenarios.展开更多
At present,there are few security models which control the communication between virtual machines (VMs).Moreover,these models are not applicable to multi-level security (MLS).In order to implement mandatory access con...At present,there are few security models which control the communication between virtual machines (VMs).Moreover,these models are not applicable to multi-level security (MLS).In order to implement mandatory access control (MAC) and MLS in virtual machine system,this paper designs Virt-BLP model,which is based on BLP model.For the distinction between virtual machine system and non-virtualized system,we build elements and security axioms of Virt-BLP model by modifying those of BLP.Moreover,comparing with BLP,the number of state transition rules of Virt-BLP is reduced accordingly and some rules can only be enforced by trusted subject.As a result,Virt-BLP model supports MAC and partial discretionary access control (DAC),well satisfying the requirement of MLS in virtual machine system.As space is limited,the implementation of our MAC framework will be shown in a continuation.展开更多
Nowadays, African cities are subjected to upsets which result from the extraordinary growth of urban populations. The growth of the population of cities has induced some changes in the structure of the activity of tho...Nowadays, African cities are subjected to upsets which result from the extraordinary growth of urban populations. The growth of the population of cities has induced some changes in the structure of the activity of those cities. Agriculture which was formerly confined to the countryside henceforth develops in the urban area and occupies a preponderant place as a strategy of survival, of insertion and of food supplying of the city-dwellers. It has become an activity integrated to the urban tissue through systems of occupying and exploitation of land in the urban area. Population growth (4.81%) between 2002 and 2013 is a critical poverty rate (65%) of the population of Parakou city, entailing a misery perceptible in all its social and economic dimensions. The market-gardening activity has integrated itself to the urban tissue. The objective of this study is to understand how urban agriculture through market-gardening can be a solution for rural farmers who have moved to Parakou city. In this study, documentary research, interviews and field observation are used for data collection. The main results to be signaled among others are: evolution and status of the market-gardening areas in Parakou, the reduction of food insecurity with the permanent availability in quantity and in quality of market-gardening products accessible to the population: the protection of the environment through the drainage of the urban area and the preservation of the diversity of vegetables;the increase of the income of the households of the farmers and the creation of employments.展开更多
Since the 1970s, according to the international pension system reform trend for old-age social security system, no single institutional arrangement can ensure the functions of endowment security system to achieve the ...Since the 1970s, according to the international pension system reform trend for old-age social security system, no single institutional arrangement can ensure the functions of endowment security system to achieve the optimal.Therefore,how to based on the present situation of development, and to accurately, thus promote the resources integration, comprehensive build multi-level old-age security system, has important policy and practice significance.展开更多
This paper deals with the security of stock market transactions within financial markets, particularly that of the West African Economic and Monetary Union (UEMOA). The confidentiality and integrity of sensitive data ...This paper deals with the security of stock market transactions within financial markets, particularly that of the West African Economic and Monetary Union (UEMOA). The confidentiality and integrity of sensitive data in the stock market being crucial, the implementation of robust systems which guarantee trust between the different actors is essential. We therefore proposed, after analyzing the limits of several security approaches in the literature, an architecture based on blockchain technology making it possible to both identify and reduce the vulnerabilities linked to the design, implementation work or the use of web applications used for transactions. Our proposal makes it possible, thanks to two-factor authentication via the Blockchain, to strengthen the security of investors’ accounts and the automated recording of transactions in the Blockchain while guaranteeing the integrity of stock market operations. It also provides an application vulnerability report. To validate our approach, we compared our results to those of three other security tools, at the level of different metrics. Our approach achieved the best performance in each case.展开更多
文摘The article discusses the determinant factor of the function of the securities market at first and then proposes that the basic factor is the inherent need of social economic operation and development process itself. In addition, the primary factor of mature securities market is perfect and integrated function of the securities market. Afterwards, the article analyses the static and dynamic function of the securities market. At last, it probes into the government role in the securities market briefly and proposes that China needs to carry out the essential change on government role, market function location, development goal and the mode of securities market if the function of China's securities market is to be exerted properly.
文摘The Chinese securities market has been developing gradually since the introduction of the economic reform and opening to the outside world. In 1981, our government issued national bonds in a bid to relieve the financial pressure. During the five years of 1981-1985, our country accumulated negotiable securities of RMB24.2 billion, mainly national bonds, accOunting for 97.9 percent of the total. Since 1986, the securities market has been developing towards diversification, along with increasing varieties. From 1986 to 1990,
文摘At the present stage,with the continuous development of social economy and science and technology,China's financial and securities industry has gradually developed.As an important part of China's socialist economic market,including the financial and securities industry,therefore,to a certain extent,the development of the financial securities industry has promoted the prosperity and development of China's economy.In other words,strengthening the management of financial securities market regulation can promote the sustainable development of the securities industry,thereby promoting the rapid development of China's economy.This paper mainly discusses and expounds some problems existing in the current process of financial securities market regulation,and proposes solutions to it,hoping to be helpful to the financial securities industry.
基金supported by National Key Basic Research and Development Plan (973 Plan) of China (No. 2007CB310900)National Natural Science Foundation of China (No. 90612018, 90715030 and 60970008)
文摘This paper is a continuation of our last paper [1] which describes the theory of Virt-BLP model. Based on Virt-BLP model,this paper implements a mandatory access control(MAC) framework applicable to multi-level security(MLS) in Xen. The Virt-BLP model is the theoretical basis of this MAC framework,and this MAC framework is the implementation of Virt-BLP model. Our last paper focuses on Virt-BLP model,while this paper concentrates on the design and implementation of MAC framework. For there is no MAC framework applicable to MLS in virtual machine system at present,our MAC framework fills the blank by applying Virt-BLP model to Xen,which is better than current researches to guarantee the security of communication between virtual machines(VMs) . The experimental results show that our MAC framework is effective to manage the communication between VMs.
文摘Traditional multi-level security(MLS)systems have the defect of centralizing authorized facilities,which is difficult to meet the security requirements of modern distributed peer-to-peer network architecture.Blockchain is widely used in the field of access control with its decentralization,traceability and non-defective modification.Combining the blockchain technology and the Bell-LaPadula model,we propose a new access control model,named BCBLPM,for MLS environment.The“multi-chain”blockchain architecture is used for dividing resources into isolated access domains,providing a fine-grained data protection mechanism.The access control policies are implemented by smart contracts deployed in each access domain,so that the side chains of different access domains storage access records from outside and maintain the integrity of the records.Finally,we implement the BC-BLPM prototype system using the Hyperledger Fabric.The experimental and analytical results show that the model can adapt well to the needs of multi-level security environment,and it has the feasibility of application in actual scenarios.
基金Acknowledgements This work was supported by National Key Basic Research and Development Plan (973 Plan) of China (No. 2007CB310900) and National Natural Science Foundation of China (No. 90612018, 90715030 and 60970008).
文摘At present,there are few security models which control the communication between virtual machines (VMs).Moreover,these models are not applicable to multi-level security (MLS).In order to implement mandatory access control (MAC) and MLS in virtual machine system,this paper designs Virt-BLP model,which is based on BLP model.For the distinction between virtual machine system and non-virtualized system,we build elements and security axioms of Virt-BLP model by modifying those of BLP.Moreover,comparing with BLP,the number of state transition rules of Virt-BLP is reduced accordingly and some rules can only be enforced by trusted subject.As a result,Virt-BLP model supports MAC and partial discretionary access control (DAC),well satisfying the requirement of MLS in virtual machine system.As space is limited,the implementation of our MAC framework will be shown in a continuation.
文摘Nowadays, African cities are subjected to upsets which result from the extraordinary growth of urban populations. The growth of the population of cities has induced some changes in the structure of the activity of those cities. Agriculture which was formerly confined to the countryside henceforth develops in the urban area and occupies a preponderant place as a strategy of survival, of insertion and of food supplying of the city-dwellers. It has become an activity integrated to the urban tissue through systems of occupying and exploitation of land in the urban area. Population growth (4.81%) between 2002 and 2013 is a critical poverty rate (65%) of the population of Parakou city, entailing a misery perceptible in all its social and economic dimensions. The market-gardening activity has integrated itself to the urban tissue. The objective of this study is to understand how urban agriculture through market-gardening can be a solution for rural farmers who have moved to Parakou city. In this study, documentary research, interviews and field observation are used for data collection. The main results to be signaled among others are: evolution and status of the market-gardening areas in Parakou, the reduction of food insecurity with the permanent availability in quantity and in quality of market-gardening products accessible to the population: the protection of the environment through the drainage of the urban area and the preservation of the diversity of vegetables;the increase of the income of the households of the farmers and the creation of employments.
文摘Since the 1970s, according to the international pension system reform trend for old-age social security system, no single institutional arrangement can ensure the functions of endowment security system to achieve the optimal.Therefore,how to based on the present situation of development, and to accurately, thus promote the resources integration, comprehensive build multi-level old-age security system, has important policy and practice significance.
文摘This paper deals with the security of stock market transactions within financial markets, particularly that of the West African Economic and Monetary Union (UEMOA). The confidentiality and integrity of sensitive data in the stock market being crucial, the implementation of robust systems which guarantee trust between the different actors is essential. We therefore proposed, after analyzing the limits of several security approaches in the literature, an architecture based on blockchain technology making it possible to both identify and reduce the vulnerabilities linked to the design, implementation work or the use of web applications used for transactions. Our proposal makes it possible, thanks to two-factor authentication via the Blockchain, to strengthen the security of investors’ accounts and the automated recording of transactions in the Blockchain while guaranteeing the integrity of stock market operations. It also provides an application vulnerability report. To validate our approach, we compared our results to those of three other security tools, at the level of different metrics. Our approach achieved the best performance in each case.