Chinese Academy of Personnel Science

Sketch demonstrates good properties in spread estimation over network measurements, providing fast processing and accurate estimation under limited memory usage. However, most current methods remain limited to single-flow spread estimation, resulting in suboptimal performance when applied to range spread estimation that requires measuring the spread of a range of flows. In this paper, we propose LocalSketch, a novel sketch that achieves both high estimation accuracy and memory efficiency for range spread estimation with provable theoretical guarantees. LocalSketch has two key innovations: (1) local key aggregation within predefined ranges that eliminates duplicate spread information through locality correlation, and (2) adaptive counter sizing that dynamically allocates memory resources for large-spread ranges while maintaining compact representations for low-spread ranges. LocalSketch also features an efficient abnormal bucket detection mechanism by comparing identification sign, avoiding exhaustive bucket traversal during super range detection. Moreover, the main idea of LocalSketch can be adapted to existing plug-in spread counters, which has been experimentally proved. We provide a theoretical analysis of estimation accuracy and conduct comprehensive evaluations using real-world network traffic datasets. Experimental results demonstrate that LocalSketch outperforms state-of-the-art methods by achieving 76× higher estimation accuracy for range spread estimation, while showing 15× better accuracy and 39× faster detection speed for super range identification across all datasets.

Recently, the Metaverse boom has swept the world.To improve the voice in the future digital field, major countries and well-known enterprises have accelerated arrangement of this emerging industry.However, there is no unified definition and ultimate form description of Metaverse.It is urgent to understand the essential characteristics, evolution trend and security risks of Metaverse scientifically, which can promote the high-quality development of China’s electronic information industry and ensure the cyberspace security.With literature research and related information analysis, the definition of Metaverse was put forward based on the core concepts such as technology and application iteration, economic and business model and the role of social relations.Additionally, the development and evolution of Metaverse were divided into four stages (data creation, digital bionics, virtual mirror and virtual-real symbiosis) according to the evolution degree of space category, space-time dimension, key technology and virtual real interaction.And the characteristics and corresponding forms of each stage were expounded.Then it analyzed the main reasons for the popularity of the Metaverse from the perspectives of innovative application demand, virtual life transformation, commercial value driving and political power driving.Focusing on the problems of challenging the national governance system, impacting the mainstream ideology, manipulating the capital market, causing potential social problems and misleading the layout of technology industry, it analyzed the multiple security risks and threats brought by the Metaverse wave from perspectives including politics, culture, economy, society and technology.It is suggested that the Metaverse is still in the stage of concept improvement and product exploration now.China should rationally grasp the development opportunities of the Metaverse based on the current situation of the electronic information industry, prepare for risks in advance, build a digital governance supervision system, stimulate industrial innovation and open development, consolidate the support of network information security, and create a healthy and orderly international environment.

In cloud storage, public key encryption with equality test (PKEET) is suitable for testing whether two ciphertexts generated from different public keys contain the same message without decryption. Recently, (Y. J. Wang <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">et al.</i> , 2019) have proposed a public key signcryption scheme with designated equality test (PKS-DET). In this scheme, since the public key of the tester is used in the encryption, the tester needs to use its secret key to test the ciphertexts. Without trapdoor, PKS-DET prevents the attacker from testing the user's ciphertexts with the stolen trapdoor. Therefore, the privacy of the user can be protected. However, if the user in the PKS-DET wants to authorize the other tester to test his/her ciphertexts for some reason, the message needs to be encrypted again by the public key of the other tester. This will lead to higher computational complexity. Hence, the PKS-DET is not flexible to authorize multiple testers. In this article, we propose a construction of PKEET supporting flexible designated authorization (PKEET-FDA). The user in our PKEET-FDA can adaptively authorize multiple testers to test his/her ciphertexts, and each authorized tester must use its secret key to perform equality test for the ciphertexts. More importantly, the user does not need to encrypt the message repeatedly any more. We demonstrate the security of PKEET-FDA under two types of adversaries. Compared with the related efficient PKEET schemes, PKEET-FDA satisfies high efficiency from the point of view of the user. In terms of storage requirement, our construction is superior to the PKS-DET.

In recent years, there has been a phenomenal proliferation of multifunctional fitness apps (MFAs), many of which are deeply ingrained into modern daily life as an aid to trace, manage, and improve users’ health and fitness. With technological advancement, these emerging information technology (IT) artifacts have the potential to facilitate the sustainable development of society and the environment. However, MFAs are facing a critical predicament: how to ensure user stickiness and continuous use. Drawing on the social support theory, this study aims to investigate stickiness as a multi-dimensional construct and to explore the antecedents of continuance usage and continuance purchase intentions in MFAs. The research model is empirically tested with data collected from 328 users of mobile fitness apps. A structural equation modeling analysis reveals both instrumental stickiness and social stickiness exert statistically significant influences on continuance usage intentions and in-app purchase intentions. Appraisal support, information support, and network support are significant antecedents for instrumental stickiness. While emotion support, esteem support, network support, and tangible support are significant antecedents for social stickiness. In addition, two facets of user sustainability—instrumental stickiness and social stickiness—exert different levels of influence on continuance usage and continuance app purchase intensions, respectively. The findings of this study will provide valuable insights for practitioners and policymakers involved in designing sustainable health products and engendering e-health systems.

Cybersecurity is a part of national security. The rules and regulations for security testing and evaluation are established in policies regarding national security review systems or cyberspace management. This paper focuses on current international systems related to cybersecurity reviews, and analyzes foreign governments' practices in information technology (IT) product and service security evaluations, critical information infrastructure (CII) security evaluation and management, information and communication technology (ICT) supply chain security and background security investigation. Based on this information and analysis, the authors research how to establish a China's cybersecurity review system in the areas of law and regulation, organization framework, operation mode, review approach, and supporting technology.

Considering the reliance of a nation's critical infrastructure and key resources on information and communication technology (ICT), identifying and controlling the ICT supply chain risk has become important for protecting national security.As the forerunner of ICT supply chain management, the United States is rich in terms of its experience in enhancing the strategic position of the ICT supply chain, undertaking risk management, ensuring security of its software and hardware, and supervising its procurement.In addition, the European Union and Russia specifically strengthen the security management of the ICT supply chain.Based on the above research, this study provides certain suggestions on China's security management of the ICT supply chain.

Transformational leadership is a hot-debated research topic. However, the study about underlying mechanism for understanding the impact of transformational leadership on performance outcomes from the perspective of cognitive psychology is few. According to this, the attention of this article is paid to the effect of transformational leadership on subordinates’ innovation performance using psychological capital as a mediator. We examine the relationship among psychological capital, transformational leadership and innovation performance of subordinates and give some practical advices on how to enhance the subordinates’ innovation performance.

Based on the review of in and out country public policy researches, We summarize the difference between our country public policy research method and the overseas related domain, Totally 79 public policy research articles are reviewed. Then, we has constructed three dimensional model of the public policy research subject matter, including three dimensions namely the procedure, the result appraisal and the interaction and integrity. Finally, some suggestions for the result application are proposed. Key words: Public Policy; Survey Method; Multi-fit Perspective

There has been a substantial disparity in the job prospects between higher education graduates from urban regions and those from the countryside in China. In other words, higher education graduates from cities find it easier to obtain jobs and to obtain better jobs than their peers who have grown up in the countryside. Against this background, the concept of "employment capability" of graduates is outlined in the article. This study conducts an analysis of the two groups' differences in employment capability and concludes that employment capability has a growing influence on the job prospects of higher education graduates in a nation with a market-oriented employment mechanism. Students growing up in the cities generally have a higher level of employment capability than those raised in the countryside before they go to university, and China's higher education system has been proven to be of little help in narrowing the gap. That is why the disparity between the job outlooks for urban and rural higher education graduates has been so dramatic. To bridge and close the gap, strong measures must be adopted to build a fair higher education system and to narrow the difference in employment capability between urban and rural graduates. At the same time, a transformation from an examination-oriented education system to a system focusing on all-around development should be promoted to balance educational development in different regions of the country.