The current China＇s social security fund adopts the operation mode of ＂combination of social pooling and individual accounts＂.With the increase of the social security fund, the settlement of these problems is very ...The current China＇s social security fund adopts the operation mode of ＂combination of social pooling and individual accounts＂.With the increase of the social security fund, the settlement of these problems is very important. In this paper, the analysis based on the problems of China＇s basic old-age insurance in the current system mode operation, the ＂nominal account system characteristics and operation of overseas advantages and disadvantages on were described in detail, and points out that the＂ nominal account ＂made for a new old-age insurance system mode is conducive to resolving the problems existing in the operation of social security fund, so as to promote the foundation of sustainable development.展开更多
As a kind of cryptocurrency, bitcoin has attracted much attention with its decentralization. However, there is two problems in the bitcoin transactions ： the account security and transaction privacy. In view of the a...As a kind of cryptocurrency, bitcoin has attracted much attention with its decentralization. However, there is two problems in the bitcoin transactions ： the account security and transaction privacy. In view of the above problems, a new partially blind threshold signature scheme is proposed, which can both enhance the security of bitcoin account and preserve the privacy of transaction. Firstly, transaction amounts are encrypted by employing the homomorphic Paillier cryptosystem, and output address is disturbed by using one-time public key. Then the encrypted or disrupted transaction information is signed by multiple participants who are authorized by using threshold secret sharing. Compared with partially blind fuzzy signature scheme, the proposed scheme can fully preserve the transaction privacy. Furthermore, performance analysis shows that the proposed scheme is secure and effective in practical applications.展开更多
文摘The current China＇s social security fund adopts the operation mode of ＂combination of social pooling and individual accounts＂.With the increase of the social security fund, the settlement of these problems is very important. In this paper, the analysis based on the problems of China＇s basic old-age insurance in the current system mode operation, the ＂nominal account system characteristics and operation of overseas advantages and disadvantages on were described in detail, and points out that the＂ nominal account ＂made for a new old-age insurance system mode is conducive to resolving the problems existing in the operation of social security fund, so as to promote the foundation of sustainable development.
基金supported by the National Key R&D Program of China(2017YFB0802000)the National Natural Science Foundation of China(61472470,61807026)the Scientific Research Plan Project of Education Department of Shaanxi Province(17JK0362)
文摘As a kind of cryptocurrency, bitcoin has attracted much attention with its decentralization. However, there is two problems in the bitcoin transactions ： the account security and transaction privacy. In view of the above problems, a new partially blind threshold signature scheme is proposed, which can both enhance the security of bitcoin account and preserve the privacy of transaction. Firstly, transaction amounts are encrypted by employing the homomorphic Paillier cryptosystem, and output address is disturbed by using one-time public key. Then the encrypted or disrupted transaction information is signed by multiple participants who are authorized by using threshold secret sharing. Compared with partially blind fuzzy signature scheme, the proposed scheme can fully preserve the transaction privacy. Furthermore, performance analysis shows that the proposed scheme is secure and effective in practical applications.
