检索结果-南通市图书馆

维普期刊数据库

A privacy preserving two-factor authentication protocol for the Bitcoin SPV nodes

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第3期63卷 34-48页

作者： Lu ZHOU Chunpeng GE Chunhua SU Division of Computer Science University of Aizu College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics

In the Bitcoin network, the simplified payment verification protocol(SPV) enables a lightweight device such as a mobile phone to participate in the bitcoin network without needed to download and store the whole Bitcoin blocks. A Bitcoin SPV node initiates and verifies transactions of the Bitcoin network through the Bitcoin wallet software which is deployed on a resource constrained device such as a mobile phone. Thus, the security of the wallet is critical for the SPV nodes as it may affect the security of user’s cryptocurrencies. However, there are some concerns about the security flaws within the SPV nodes which could lead to significant economic losses. Most of these vulnerabilities can be resolved by employing a secure user authentication protocol. Over the years, researchers have engaged in designing a secure authentication protocol. However, most proposals have security flaws or performance issues. Recently, Park et al. proposed a two-party authenticated key exchange protocol for the mobile environment. They claimed that their protocol is not only secure against various attacks but also can be deployed efficiently. However, after a thorough security analysis, we find that the Park et al.’s protocol is vulnerable to user forgery attack, smart card stolen attack and unable to provide user anonymity. To enhance security, we proposed an efficient and secure user authentication protocol for the SPV nodes in the mobile environment which can fulfill all the security requirements and has provable security. Additionally, we provide performance analysis which shows our proposed protocol is efficient for the SPV nodes in the Bitcoin network.

关键词： SPV nodes secure authentication two-factor Bitcoin

Some results on 4~m2~n designs with clear two-factor interaction components

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2008年第7期51卷 1297-1314页

作者： ZHAO ShengLi ZHANG RunChu LIU MinQian School of Mathematical Sciences Qufu Normal UniversityQufu 273165China Department of Statistics School of Mathematical Sciences and Key Laboratory of Pure Mathematics and CombinatoricsNankai UniversityTianjin 300071China

Clear effects criterion is one of the important rules for selecting optimal fractional factorial designs,and it has become an active research issue in recent *** et *** upper and lower bounds on the maximum number of clear two-factor interactions(2fi's) in 2n-(n-k) fractional factorial designs of resolutions III and IV by constructing a 2n-(n-k) design for given k,which are only restricted for the symmetrical *** paper proposes and studies the clear effects problem for the asymmetrical *** improves the construction method of Tang et *** 2n-(n-k) designs with resolution III and derives the upper and lower bounds on the maximum number of clear two-factor interaction components(2fic's) in 4m2n designs with resolutions III and *** lower bounds are achieved by constructing specific *** show that the number of clear 2fic's in the resulting design attains its maximum number in many cases,which reveals that the construction methods are satisfactory when they are used to construct 4m2n designs under the clear effects criterion.

关键词： clear mixed levels resolution two-factor interaction component

维普期刊数据库

AN IMPROVED REMOTE PASSWORD AUTHENTICATION SCHEME WITH SMART CARD

在线全文

学校读者我要写书评

暂无评论

Journal of Electronics(China) 2012年第6期29卷 550-555页

作者： Jing Chao Department of Network School of Electronics and Computer Science and TechnologyNorth University of China

This paper analyzes the security performance of a latest proposed remote two-factor user authentication scheme and proposes an improved scheme based on the dynamic ID to avoid the attacks it suffers. Besides this, in our proposed scheme the password is no longer involved in the calculation of verification phase which makes our scheme more secure and costs less than the old one. At last we analyze the performance of our proposed scheme to prove it provides mutual authentication between the user and the server. Moreover, it also resists password guessing attack, server and user masquerade attack and replay attack effectively.

关键词： two-factor Password authentication Smart card Dynamic ID

维普期刊数据库

A Solution to Implement Dynamic Authentication

在线全文

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2012年第3期2卷 177-179页

作者： Bingbing Xia Youping Dong Information Technology Department Shandong Jiao Tong University Ji Nan China

In view of the security risks of using static passwords to authenticate users, this paper gives a solution to implement two-factor authentication by using RSA token. A set of corresponding realization processes is proposed as well. Using dynamic password given by RSA can further verify user identity to improve the reliability of authentication.

关键词： Token two-factor authentication NextToken