基于LAN的File-agent技术的设计——利用File-agent技术实现LAN内大容量数据块的重用

尽管接入Internet的速度越来越快,但仍不能满足集群用户同时使用同一多媒体信息服务的需求。为了解决这类问题,该文提出了一种基于LAN的File-agent技术,利用该技术可以实现LAN内大容量数据块的重用。

File Wallet:A File Management System Based on IPFS and Hyperledger Fabric

Online file management systems enable cooperatively editing and sharing.However,due to the cost of communication and storage infrastructures,traditional online file management services,e.g.,Google Drive and OneDrive,usually provide limited storage space and relatively low download speed for free users.To achieve better performance,ordinary users have to purchase their expensive services.Moreover,these file management systems are based on centralized architecture and bear the privacy leakage risk,because users’personal files are stored and controlled by their servers.To address the above problems,we propose a peer-to-peer(P2P)file management system based on IPFS and Hyperledger Fabric,named as FileWallet,which can serve as a personal wallet for individual users or organizations to store and share their files in a secure manner.In FileWallet,the users form a P2P network and a Fabric network,where P2P network builds the connections and distributed storage network and the Fabric network sustains consistent blockchain ledgers to record file operation related transactions.In our FileWallet,the storage and communication costs are mitigated in the decentralized design,and the file owner can fully control the access permission of the file to preserve the file privacy.The design of the system architecture,main functionalities,and system implementations are presented in this paper.The performance of the system is evaluated through experiments,and the experimental results show its wide applicability and scalability.

Efficient Search in P2P File Sharing System

A new routing algorithm of peer-to-peer file sharing system with routing indices was proposed, in which a node forwards a query to neighbors that are more likely to have answers based on its statistics. The proposed algorithm was tested by creating a P2P simulator and varying the input parameters, and was compared to the search algorithms using flooding （FLD） and random walk （RW）. The result shows that with the proposed design, the queries are muted effectively, the network flows are reduced remarkably, and the peer-to-peer file sharing system gains a good expansibility.

高级文档备份工具FileGenie2000的使用

介绍了File Genic2000软件在操作系统中的安装、设置及功能简介。

Always-optimally-coordinated candidate selection algorithm for peer-to-peer files sharing system in mobile self-organized networks

In order to improve the performance of peer-to-peer files sharing system under mobile distributed en- vironments, a novel always-optimally-coordinated （AOC） criterion and corresponding candidate selection algorithm are proposed in this paper. Compared with the traditional min-hops criterion, the new approach introduces a fuzzy knowledge combination theory to investigate several important factors that influence files transfer success rate and efficiency. Whereas the min-hops based protocols only ask the nearest candidate peer for desired files, the selection algorithm based on AOC comprehensively considers users＇ preferences and network requirements with flexible balancing rules. Furthermore, its advantage also expresses in the independence of specified resource discovering protocols, allowing for scalability. The simulation results show that when using the AOC based peer selection algorithm, system performance is much better than the rain-hops scheme, with files successful transfer rate improved more than 50% and transfer time re- duced at least 20%.

Scalable Distributed File Sharing System: A Robust Strategy for a Reliable Networked Environment in Tertiary Institutions

The bane of achieving a scalable distributed file sharing system is the centralized data system and single server oriented file [sharing] system. In this paper, the solution to the problems in a distributed environment is presented. Thus, inability to upload sizeable files, slow transportation of files, weak security and lack of fault tolerance are the major problems in the existing system. Hence, the utmost need is to build a client-server network that runs on two or more server systems in order to implement scalability, such that when one server is down, the other(s) would still hold up the activities within the network. And to achieve this reliable network environment, LINUX network operating system is recommended among others as a preferred platform for the synchronization of the server systems, such that every user activity like sending of internal memos/mails, publication of academic articles, is replicated;thereby, achieving the proposed result. Hence, Scalable Distributed File Sharing System provides the robustness required to having a reliable intranet.

Peer selecting model based on FCM for wireless distributed P2P files sharing systems

IIn order to improve the performance of wireless distributed peer-to-peer(P2P)files sharing systems,a general system architecture and a novel peer selecting model based on fuzzy cognitive maps(FCM)are proposed in this paper.The new model provides an effective approach on choosing an optimal peer from several resource discovering results for the best file transfer.Compared with the traditional min-hops scheme that uses hops as the only selecting criterion,the proposed model uses FCM to investigate the complex relationships among various relative factors in wireless environments and gives an overall evaluation score on the candidate.It also has strong scalability for being independent of specified P2P resource discovering protocols.Furthermore,a complete implementation is explained in concrete modules.The simulation results show that the proposed model is effective and feasible compared with min-hops scheme,with the success transfer rate increased by at least 20% and transfer time improved as high as 34%.

Analyzing Service Rates for File Transfers in Peer-to-peer File Sharing Systems

When examining the file transfer performance in a peer-to-peer file sharing system, a fundamental problem is how to describe the service rate for a file transfer. In this paper, the problem is examined by analyzing the distribution of server-like nodes' upstream-bandwidth among their concurrent transfers. A sufficient condition for the service rate, what a receiver obtains for downloading a file, to asymptotically be uniform is presented. On the aggregate service rate for transferring a file in a system, a sufficient condition for it to asymptotically follow a Zipf distribution is presented. These asymptotic equalities are both in the mean square sense. These analyses and the sufficient conditions provide a mathematic base for modeling file transfer processes in peer-to-peer file sharing systems.

HitPeers:A P2P File Sharing System with Category Tree

HitPeers conotitute a scalable and highly efficient P2P file sharing system in which all the data file can be shared. The center of HitPeers is the Category Tree (CT). CT collects the published information with category. It is flexible enough to let users customize their own local CT. Its hierarchy helps users to find the information they desire most conveniently. To increase the robustness and retain the efficiency, HitPeers will divide the tree into disjoint parts. Every part is a subtree. Some special nodes named Onodes will take charge of the subtree and play the role of a service provider. HitPeers produce more and more Onodes to meet the service demands in the internet scale distributed environment. This paper will show the profile of the whole system.

Analysis of Blockchain Architecture in File Sharing Management for Tertiary Institution

The aim of this paper is to analyze the sharing and management of files in a tertiary institution using blockchain architecture. It is expected to enable an online system that could provide a decentralized architecture for multiple transfers and sharing of files amongst participants, to design a system that can provide data integrity and security of files using IBM Blockchain technology, to provide a system that can allow multiple user and multiple transactions at once. The research was motivated because of the security challenges associated with existing system which include: delay in transfer and sharing of files, much authority and task given to a single user in a centralized system, high risk of attack and loss of files, reduced speed of file transfer and file access/retrieval, limited number of users per time. Methodology adopted was Object Oriented Analysis Design Methodology (OOADM) in conjunction with Unified Modeling Language (UML) and IBM Blockchain Technology while the programming language used was HTML, CSS, Java and Node Js. The result after design was a decentralized cloud based file sharing and management system that enables multi-shared, replicated and permissioned transactions amongst participants in a network.

A Novel Approach to Improve the Security of P2P File-Sharing Systems

The recent and unprecedented surge of public interest in peer-to-peer (P2P) file-sharing systems has led to a variety of interesting research questions. How to minimize threats in such an open community is an impor-tant research topic. Trust models have been widely used in estimating the trustworthiness of peers in P2P file-sharing systems where peers can transact with each other without prior experience. However, current P2P trust models almost take no consideration for the nature of trust, fuzzy, complex and dynamic, which results in low efficiency in resisting the attacks of malicious nodes. In this paper, a new trust model named NatureTrust that can alleviate the shortage brought by the nature of trust is proposed. In order to cope with the fuzzy characteristic of trust, linguistic terms are used to express trust. Additionally, fuzzy inference rules are employed to evaluate trust of each transaction so as to handle the complex characteristic of trust. Fur-thermore, risk factor is deployed into NatureTrust to represent and reason with the dynamic characteristic of trust. Both risk and trust factors are considered in evaluating the trustworthiness of each peer. Experimental results show that the trust model analyzed here thus stands against malicious act effectively.

Shape File文件转化GML文件方法的研究

地理标记语言GML(Geography Markup Language)通过对空间数据进行规范化的编码和描述,使得不同平台下的所有用户可以无缝地获取、访问、浏览空间数据,从而实现异构平台之间地理空间信息的互操作与共享。ShapeFile文件到GML文件的转化为目前在基层测绘单位大量存储的ShapeFile文件实现数据共享提供了一种有效方法。

以患者为中心基于IPFS和区块链的医疗信息共享方案

医疗机构之间的电子病历(EMR)存储与共享,对实现跨院诊断和分级诊疗至关重要,可以有效减轻患者的负担和避免重复检查。针对EMR难以安全存储和共享的问题,提出一种以患者为中心基于星际文件系统(IPFS)和区块链的EMR安全存储与高效共享(PCIB-MIS)方案。首先,应用混合加密策略,以安全存储与共享EMR,缩减加解密时间;其次,通过区块链存储EMR的密文索引;再次,结合联盟链与私有链以降低存储压力,EMR索引存于医院私有链;最后,EMR密文存放于IPFS,确保数据安全和不可篡改。当需要跨院调取EMR时,进行以联盟链为中心的跨链调用与代理重加密。安全性分析与实验结果表明,仅被授权医生可获取患者病历;与公钥加密算法RSA相比,将加解密时间降低至毫秒级别;与将EMR单一存放于区块链上的方案相比,节省了98.8%的区块存储空间。所提方案可以实现病历安全存储与共享,大幅压缩EMR加解密时间和减轻区块链存储压力。

档案数字化管理研究

档案数字化是档案管理变革的关键,它深刻改变了档案信息的运用和服务模式。通过数字化,档案的内容与物质载体实现了有效分离,使档案信息能够跨越时空的局限,极大拓宽了其应用范围。这一变革不仅突破了档案管理机构过去对纸质档案的传统管理方式,而且推动了档案管理从实体管理向内容管理的转型,进一步提升了档案服务的效率与品质。但档案数字化管理上也出现了某些问题,文章针对当下档案数字化管理的现状,提出了一些针对性强的建议,使数字化档案能够充分发挥作用,更好地实现档案信息化建设。

企业人事档案数字化业务共享服务项目建设实践

企业人事档案数字化业务共享服务项目建设分为项目启动、需求调研、系统设计以及系统开发和部署四个主要阶段。通过成立专门团队并进行深入调研确保了项目的顺利启动,通过需求调研详细了解并满足用户需求。在系统设计阶段,将调研信息转化为具体设计方案,重点解决技术难题;在开发和部署阶段,团队采用敏捷开发策略,严格测试并部署系统。实施结果显示,数字化显著提升了人事档案管理效率和安全性,有效支持了企业战略目标的实现,实现了公司年度经济收入的显著增长。通过数字化转型,企业构建了更加高效和安全的档案管理模式。

基于云计算服务的文件存储与共享

随着云计算技术的发展,基于云计算服务的文件存储与共享已成为现代信息化社会的重要组成部分。文章概述了云计算服务的定义、类型和优势,分析了文件存储与共享的需求,并就基于云计算的文件存储技术与文件共享技术进行了详细探讨,指出未来的研究可进一步探索云计算服务在文件存储与共享领域的潜在应用和挑战。

基于云计算的高校人力资源档案集成共享方法

针对传统高校人力资源档案管理方法中存在的信息孤岛与数据分散等问题,提出基于云计算的高校人力资源档案集成共享方法。采用基于中间件的集成模式,将高校人力资源方案信息集成到Hadoop分布式文件系统(Hadoop Distributed File System,HDFS)中,再通过云计算环境完成高校人力资源档案信息的加密共享。实验结果表明,设计方法集成共享高校人力资源档案数据时,吞吐量始终在650~680 Mb/s,集成共享性能优越。

基于区块链的病历档案存储系统

传统的电子病历档案存在易受到攻击,信息易被泄露、被篡改,数据难共享等问题。针对这些问题,利用区块链分布式、防篡改、可溯源等特性,设计一种基于区块链的病历档案存储系统,解决了病患对其隐私数据的保护和医疗机构之间文件的共享问题。结合星际文件系统永久性和去中心化存储文件的特性,缓解了区块链对于大文件上链成本高,上链难的压力。数字签名的使用保证了病患对其病历信息的知情权和可控权。最后根据系统实现和结果,与相关系统进行了比较分析。

内蒙古地区档案资源的信息化整合与共享机制研究

内蒙古地区档案资料的信息化整理与共有机制构成了推进档案管理现代化的关键路径。近年来,内蒙古地区致力于档案资源管理的标准化、数字化和信息化进程,全面提高了档案的搜集、整理、储存及应用效率,通过完善档案管理的规章制度,搭建具有良好扩展性的档案信息平台,推行多元化的资料查找方法,以及打造数字化资料储备库,达成了对档案资料的优化整合与便捷共享。加强档案安全保护机制,保障档案信息的完整性及可信度,依托大数据、云计算、人工智能等前沿技术,内蒙古地区逐渐打造了一套全链条数字化的档案管控体系,提高了档案资源的利用效率,促进了档案工作的优质发展。文中探索了内蒙古地区档案资料的信息化重组及共有模式,这对优化档案管理效率,促进地区经济发展具有显著意义。

非结构化P2P系统的路由算法

针对非结构化对等网络中洪泛搜索机制的路由盲目性问题,提出了一种利用节点积累的经验指导节点传播查询的路由算法。在该路由算法中,节点记录自己关注的主题和满足主题的邻居节点,建立主题与邻居节点的对应关系表,当节点收到查询后 节点就利用该表来指导节点选择查询路由,以便更快地找到查询结果。仿真试验和性能分析表明该算法有效地减少了查询带来的网络流量,提高了查找成功率。