In the digital information age,distributed file storage technologies like the InterPlanetary File System(IPFS)have gained considerable traction as a means of storing and disseminating media content.Despite the advanta...In the digital information age,distributed file storage technologies like the InterPlanetary File System(IPFS)have gained considerable traction as a means of storing and disseminating media content.Despite the advantages of decentralized storage,the proliferation of decentralized technologies has highlighted the need to address the issue of file ownership.The aim of this paper is to address the critical issues of source verification and digital copyright protection for IPFS image files.To this end,an innovative approach is proposed that integrates blockchain,digital signature,and blind watermarking.Blockchain technology functions as a decentralized and tamper-resistant ledger,recording and verifying the source information of files,thereby establishing credible evidence of file origin.A digital signature serves to authenticate the identity and integrity of the individual responsible for uploading the file,ensuring data security.Furthermore,blind watermarking is employed to embed invisible information within images,thereby safeguarding digital copyrights and enabling file traceability.To further optimize the efficiency of file retrieval within IPFS,a dual-layer Distributed Hash Table(DHT)indexing structure is proposed.This structure divides file index information into a global index layer and a local index layer,significantly reducing retrieval time and network overhead.The feasibility of the proposed approach is demonstrated through practical examples,providing an effective solution to the copyright protection issues associated with IPFS image files.展开更多
针对当前基于Web服务的空间信息格网(Spatial Information Grid,SIG)系统无法获取资源中间状态的缺点,探讨了一种基于Web服务资源框架(Web Service Resource Framework,WSRF)构建SIG的实现技术,而使SIG成为一种能够提供资源中间状态(sta...针对当前基于Web服务的空间信息格网(Spatial Information Grid,SIG)系统无法获取资源中间状态的缺点,探讨了一种基于Web服务资源框架(Web Service Resource Framework,WSRF)构建SIG的实现技术,而使SIG成为一种能够提供资源中间状态(stateful)的系统,有利于客户端与服务端的持久交互和状态回溯.在介绍了WSRF框架及其实现方式的基础上,探讨了基于WSRF构建空间信息服务的流程和关键,即确定系统中状态化的资源种类和空间信息服务.以地理坐标转换为例示范了状态化服务资源的创建过程,并提出了基于WSRF的SIG服务框架.展开更多
随着GIS的普及和深化,空间信息的大数据量、高复杂性和难共享的问题对其研究和应用提出了新的挑战。空间信息网格 (Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,为解决这些问题提供了新的契机。本文在给...随着GIS的普及和深化,空间信息的大数据量、高复杂性和难共享的问题对其研究和应用提出了新的挑战。空间信息网格 (Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,为解决这些问题提供了新的契机。本文在给出SIG基本定义和基本特征的基础上,就如何实现基于SIG的矿产资源评价进行了有益的探索和实践,并取得了很好的效果,为矿产资源评价提供了新的方法和思路。展开更多
基金supported by the Doctoral Research Foundation of Chongqing Normal University(Nos.21XLB030,21XLB029)the Key Program of Chongqing Education Science Planning Project(No.K22YE205098).
文摘In the digital information age,distributed file storage technologies like the InterPlanetary File System(IPFS)have gained considerable traction as a means of storing and disseminating media content.Despite the advantages of decentralized storage,the proliferation of decentralized technologies has highlighted the need to address the issue of file ownership.The aim of this paper is to address the critical issues of source verification and digital copyright protection for IPFS image files.To this end,an innovative approach is proposed that integrates blockchain,digital signature,and blind watermarking.Blockchain technology functions as a decentralized and tamper-resistant ledger,recording and verifying the source information of files,thereby establishing credible evidence of file origin.A digital signature serves to authenticate the identity and integrity of the individual responsible for uploading the file,ensuring data security.Furthermore,blind watermarking is employed to embed invisible information within images,thereby safeguarding digital copyrights and enabling file traceability.To further optimize the efficiency of file retrieval within IPFS,a dual-layer Distributed Hash Table(DHT)indexing structure is proposed.This structure divides file index information into a global index layer and a local index layer,significantly reducing retrieval time and network overhead.The feasibility of the proposed approach is demonstrated through practical examples,providing an effective solution to the copyright protection issues associated with IPFS image files.
文摘针对当前基于Web服务的空间信息格网(Spatial Information Grid,SIG)系统无法获取资源中间状态的缺点,探讨了一种基于Web服务资源框架(Web Service Resource Framework,WSRF)构建SIG的实现技术,而使SIG成为一种能够提供资源中间状态(stateful)的系统,有利于客户端与服务端的持久交互和状态回溯.在介绍了WSRF框架及其实现方式的基础上,探讨了基于WSRF构建空间信息服务的流程和关键,即确定系统中状态化的资源种类和空间信息服务.以地理坐标转换为例示范了状态化服务资源的创建过程,并提出了基于WSRF的SIG服务框架.
文摘随着GIS的普及和深化,空间信息的大数据量、高复杂性和难共享的问题对其研究和应用提出了新的挑战。空间信息网格 (Spatial Information Grid,SIG)作为创新性的网络空间信息基础设施和技术体系,为解决这些问题提供了新的契机。本文在给出SIG基本定义和基本特征的基础上,就如何实现基于SIG的矿产资源评价进行了有益的探索和实践,并取得了很好的效果,为矿产资源评价提供了新的方法和思路。
