scholarly journals KORGAN: An Efficient PKI Architecture Based on PBFT Through Dynamic Threshold Signatures

2020 ◽  
Author(s):  
Murat Yasin Kubilay ◽  
Mehmet Sabir Kiraz ◽  
Haci Ali Mantar
Keyword(s):  
Dynamic Threshold ◽  
Threshold Signature ◽  
Management Framework ◽  
The Past ◽  
New Public ◽  
Man In The Middle ◽  
Network Operations ◽  
Threshold Signatures ◽  
Security Incidents ◽  
Management Symposium

Abstract During the past decade, several misbehaving certificate authorities (CAs) have issued fraudulent TLS certificates allowing man-in-the-middle (MITM) kinds of attacks that result in serious security incidents. In order to avoid such incidents, Yakubov et al. ((2018) A blockchain-based PKI management framework. NOMS 2018 - 2018 IEEE/IFIP Network Operations and Management Symposium, Taipei, Taiwan, April, pp. 16. IEEE) recently proposed a new public key infrastructure (PKI) architecture where CAs issue, revoke and validate X.509 certificates on a public blockchain. However, in their proposal TLS clients are subject to MITM kinds of attacks, and certificate transparency is not fully provided. In this paper, we eliminate the issues of the Yakubov et al.’s scheme and propose a new PKI architecture based on permissioned blockchain with PBFT consensus mechanism where the consensus nodes utilize a dynamic threshold signature scheme to generate signed blocks. In this way, the trust to the intermediary entities can be completely eliminated during certificate validation. Our scheme enjoys the dynamic property of the threshold signature because TLS clients do not have to change the verification key even if the validator set is dynamic. We implement our proposal on private Ethereum network to demonstrate the experimental results. The results show that our proposal has negligible overhead during TLS handshake. The certificate validation duration is less than the duration in the conventional PKI and Yakubov et al.’s scheme.

scholarly journals Towards Developing Innovation Management Framework (IMF) for ICT Organizations at Pakistan

2021 ◽  
Author(s):  
Eram Abbasi ◽  
Imran Amin ◽  
Shama Siddiqui
Keyword(s):  
Comparative Analysis ◽  
Literature Review ◽  
Innovation Management ◽  
Factors Affecting ◽  
Management Framework ◽  
Underdeveloped Countries ◽  
The Past ◽  
Similarities And Differences ◽  
Industry Culture ◽  
Developed World

Abstract Various aspects of innovation management have been discussed in literature over the past few decades. Most of the innovation management frameworks have been formulated by undertaking studies in the developed world and lack the industry / culture specific focus. In this paper we revisit the generic innovation management studies to develop an innovation management framework for highlighting the factors affecting innovation specifically at the ICT sector of Pakistan. A detailed literature review has been conducted to identify the factors included in the past innovation management models. To identify the factors specific for Pakistan, senior level professionals, working at the Pakistani ICT organizations were interviewed. A comparative analysis of the innovation management frameworks for Pakistan against those previously found in literature revealed interesting similarities and differences. Based on the study findings, an innovation management framework is developed that highlights the present factors which are important for innovation in the ICT sector for Pakistan. This framework can be used by Pakistan and other underdeveloped countries for improving their innovation in ICT sectors in particular and other sectors in general.

scholarly journals Economic effort management in multispecies fisheries: the FcubEcon model

2010 ◽  
Vol 67 (8) ◽  
pp. 1802-1810 ◽  
Author(s):  
Ayoe Hoff ◽  
Hans Frost ◽  
Clara Ulrich ◽  
Dimitrios Damalas ◽  
Christos D. Maravelias ◽  
...  
Keyword(s):  
Single Species ◽  
Fish Stock ◽  
Economic Optimization ◽  
Management Tools ◽  
Management Framework ◽  
Fish Stocks ◽  
Effort Allocation ◽  
Multispecies Fisheries ◽  
The Past ◽  
Quota Management

Abstract Hoff, A., Frost, H., Ulrich, C., Damalas, D., Maravelias, C. D., Goti, L., and Santurtún, M. 2010. Economic effort management in multispecies fisheries: the FcubEcon model. – ICES Journal of Marine Science, 67: 1802–1810. Applying single-species assessment and quotas in multispecies fisheries can lead to overfishing or quota underutilization, because advice can be conflicting when different stocks are caught within the same fishery. During the past decade, increased focus on this issue has resulted in the development of management tools based on fleets, fisheries, and areas, rather than on unit fish stocks. A natural consequence of this has been to consider effort rather than quota management, a final effort decision being based on fleet-harvest potential and fish-stock-preservation considerations. Effort allocation between fleets should not be based on biological considerations alone, but also on the economic behaviour of fishers, because fisheries management has a significant impact on human behaviour as well as on ecosystem development. The FcubEcon management framework for effort allocation between fleets and fisheries is presented, based on the economic optimization of a fishery's earnings while complying with stock-preservation criteria. Through case studies of two European fisheries, it is shown how fishery earnings can be increased significantly by reallocating effort between fisheries in an economically optimal manner, in both effort-management and single-quota management settings.

Social Co-Governance

2017 ◽  
Vol 9 (1) ◽  
pp. 65-83
Author(s):  
Wang Chunting ◽  
Lan Yuxin
Keyword(s):  
Public Administration ◽  
Social Conditions ◽  
Administrative Reforms ◽  
The Past ◽  
Legitimation Crisis ◽  
New Public ◽  
Governance Tools ◽  
The Government ◽  
Government Reforms ◽  
Political Economic

In the past 20-30 years, industrialization and informatization made the society more complicated and social conflicts more difficult to deal with; citizens and their demands diversified, and we are now in urgent need of a new public administration model that suits the changed political, economic, and social conditions. Governance thus emerged worldwide, promoting government reforms and public participation, and urging the government to delegate and empower, and quit the fields that they are not good at managing. Scholars discuss the reasons for the emergence of governance from the perspectives of managerialism, the rise of civil society, and administrative reforms. But these are not the only reasons for governance to rise to prominence. It emerged, in a way, in response to the “legitimation crisis” described by Jurgen Habermas. As society develops, citizens require more legitimacy from the government on the basis of what it already provides, and this may involve performance, participation, responsiveness, law-based administration, etc. We hereby analyze the legitimation crisis in a postmodern society and point out that the paradigm of social co-governance is a response to these legitimacy demands and that multiple parties integrate their demands using governance tools such as participation, consultation, empowerment, etc.

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