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Blockchain-Enabled Privacy Protection and Access Control Scheme Towards Sensitive Digital Assets management

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China Communications 2024年第7期21卷 224-236页

作者： Duan Pengfei ma zhaofeng Zhang Yuqing Wang Jingyu Luo Shoushan School of Cyberspace Security Beijing University of Posts and TelecommunicationsBeijing 100876China

With the growth of requirements for data sharing,a novel business model of digital assets trading has emerged that allows data owners to sell their data for monetary *** the distributed ledger of blockchain,however,the privacy of stakeholder's identity and the confidentiality of data content are ***,we proposed a blockchainenabled privacy-preserving and access control scheme to address the above ***,the multi-channel mechanism is introduced to provide the privacy protection of distributed ledger inside the channel and achieve coarse-grained access control to digital ***,we use multi-authority attribute-based encryption(maABE)algorithm to build a fine-grained access control model for data trading in a single channel and describe its instantiation in *** analysis shows that the scheme has IND-CPA secure and can provide privacy protection and collusion *** with other schemes,our solution has better performance in privacy protection and access *** evaluation results demonstrate its effectiveness and practicability.

关键词： access control data trading maABE multi-channel privacy preserving

CPSec DLP: Kernel-Level Content Protection Security System of Data Leakage Prevention

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Chinese Journal of Electronics 2017年第4期26卷 827-836页

作者： ma zhaofeng School of Cyberspace Security Beijing University of Posts and Telecommunications

Data leakage prevention(DLP) is very important for sensitive or unauthorized data protection, however, most current DLP technologies are based on content monitor, detection and filtering, which can be easily bypassed or cheated. We propose a thorough and highlevel Content protection secure scheme of DLP(CPSec DLP) based on kernel-level mandatory encryption, in which we proposed mutual authentication and key agreement method between client and server, and we adopted SM2 algorithm for session key management; and we propose kernel-level mandatory secure middleware for unstructured data protection, in which the secure middleware works in File system driver(FSD) layer supporting for"write-encryption, open-decryption" operation, once the data is written to storage space either in hard-disk or USB disk the data is mandatorily encrypted, while when the data is open the mandatory secure middleware decrypts the data to plain in system memory. Moreover we propose data share and delivery among domain internal users and external customers. In the CPSec DLP scheme, the encryption algorithms, security policy and rules can be dynamically parameterized when necessary, while in the lifecycle the data management can only be used according to its usage control rules, such as read-only, write, save, print,export, backup rights. Upon the proposed CPSec DLP, we implemented the CPSec DLP system in kernel-level driver layer based on FSD, which supports parameterized process and document format for unstructured data leakage protection. Large amount of experiments manifest the proposed scheme is secure, reliable, extendible and efficient for kinds of format unstructured data leakage protection.

关键词： Content protection security Unstruc tured data leakage protection Kernel-level mandatory en cryption/decryption Usage controls

Digital Rights management：Model,Technology and Application

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China Communications 2017年第6期14卷 156-167页

作者： zhaofeng ma School of Cyberspace Security Beijing University of Posts and Telecommunications Beijing 100876 China

with rapid achievement of current information technology and computing ability and applications,much more digital content such as films,cartoons,design drawings,office documents and software source codes are produced in daily work,however to protect the content being copying,shared or deliberately stolen by inside or outside,digital rights management(DRM) became more and more important for digital content *** this paper,we studied various DRM model,technology and application,and first proposed DRM Security Infrastructure(DSI),in which we defined encryption,hash,signature algorithm,watermarking algorithms,authentication,usage control,trusted counter,conditional trace,secure payment,and based on the DSI we then proposed a whole classification approach and architecture of all kinds of DRMs,in which we proposed 6 typical classes of copyrights and content protection DRMs architecture:(1) Software-oriented DRM,(2) e Book-oriented DRM,(3) Video-oriented DRM,(4) Image-Oriented DRM(5) Unstructured data oriented DRM,(6) Text-oriented *** on the above DSI,we then proposed a dynamic DRM model selection method for various DRM application,which can be adapted dynamically for different technology of different applications,which can provide awhole solution for variant DRM development in a rapid and customized *** proposed DRM method,technology and application in this paper provided a common,flexible and extendable solution for variant DRM scenes,and can support rapid and customized ***,we proposed an opinion that the future life will enter into a new era that the content usage and consumption will not again adopt DRM technology rather than with law,liberty and morality.

关键词： digital rights management drm security infrastructure encryption watermark usage control drm-free

A Blockchain-Based Credible and Secure Education Experience Data management Scheme Supporting for Searchable Encryption

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China Communications 2021年第6期18卷 172-183页

作者： Zihan Li zhaofeng ma International School Beijing University of Posts and TelecommunicationsBeijing 100876China School of Cyberspace Security Beijing University of Posts and TelecommunicationsBeijing100876China

With the in-depth application of new technologies such as big data in education fields,the storage and sharing model of student education records data still faces many challenges in terms of privacy protection and efficient *** this paper,we propose a data security storage and sharing scheme based on consortium blockchain,which is a credible search scheme without *** our scheme,the implementation of data security storage is using the blockchain and storage server *** detail,the smart contract provides protection for data keywords,the storage server stores data after data masking,and the blockchain ensures the traceability of query *** need for precise privacy data is achieved by constructing a *** techniques such as AES and RSA are used for encrypted storage of data,keywords,and digital *** analysis and performance evaluation shows that the availability,high efficiency,and privacy-preserving can be ***,this scheme has better robustness compared to other educational records data sharing models.

关键词： blockchain,big data,data transmission smart contract searchable encryption

A common property of R(E,F) and B(R^n,R^m) and a new method for seeking a path to connect two operators

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Science China mathematics 2010年第10期53卷 2605-2620页

作者： ma zhaofeng ma JiPu Zhejiang Inst Commun Dept Informat & Management Hangzhou 311112 Zhejiang Peoples R China Harbin Normal Univ Tseng Yuan Rong Funct Anal Res Ctr Harbin 150025 Peoples R China

Given two Banach spaces E,F,let B(E,F) be the set of all bounded linear operators from E into F,and R(E,F) the set of all operators in B(E,F) with finite *** is well-known that B(Rn) is a Banach space as well as an algebra,while B(Rn,Rm) for m = n,is a Banach space but not an algebra;meanwhile,it is clear that R(E,F) is neither a Banach space nor an ***,in this paper,it is proved that all of them have a common property in geometry and topology,i.e.,they are all a union of mutual disjoint path-connected and smooth submanifolds (or hypersurfaces).Let Σr be the set of all operators of finite rank r in B(E,F) (or B(Rn,Rm)).In fact,we have that 1) suppose Σr∈ B(Rn,Rm),and then Σr is a smooth and path-connected submanifold of B(Rn,Rm) and dimΣr = (n + m)r-r2,for each r ∈ [0,min{n,m});if m = n,the same conclusion for Σr and its dimension is valid for each r ∈ [0,min{n,m}];2) suppose Σr∈ B(E,F),and dimF = ∞,and then Σr is a smooth and path-connected submanifold of B(E,F) with the tangent space TAΣr = {B ∈ B(E,F) : BN(A)-R(A)} at each A ∈Σr for 0 r mation of matrices in B(Rn),and more adapted and simple than the elementary transformation *** addition to tensor analysis and application of Thom’s famous result for transversility,these will benefit the study of infinite geometry.

关键词： operator of finite rank smooth Banach submanifold matrix

Secure DRM Scheme Based on Blockchain with High Credibility

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Chinese Journal of Electronics 2018年第5期27卷 1025-1036页

作者： ma zhaofeng HUANG Weihua GAO Hongmin School of Cyberspace Security Beijing University of Posts and Telecommunications

Upon the fairness, security and flexibility problems of traditional digital rights management, we proposed a blockchain infrastructure service based DRM platform with high-level credit and security, in which we first proposed a Blockchain as a service(Baa S) architecture to decrease the complexity and difficulty of building up a blockchain-based business model, the Baa S infrastructure transparently provides easily-developed user interface to implement all core functions such as genesis block creation, consensus mechanism definition, node initialization and running, wallet management, address management,blockchain explorer et al. Then based on the Baa S infrastructure we proposed a blockchain-based DRM platform with high-level credit and security for Content provider(CP), Service provider(SP) and customers. We designed the blockchain as infrastructure service for DRM business model and provided core content rights information storage in blockchain for tamper-resistant copyrights protection from being misused, and the content consumers can use blockchain-based digital assets for content consumption payment, and the platform can help the content demandside and supply-side trading and the blockchain recorded the trade data as tamper-resistant evidence. Evaluation experiments manifests the proposed scheme is reliable and secure, and provided an efficient methodology for blockchain application business model implementation.

关键词： Blockchain infrastructure Digital rights management Tamper-resistance DRM trade

Compressive Sensing-Based Audio Semi-fragile Zero-Watermarking Algorithm

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Chinese Journal of Electronics 2015年第3期24卷 492-497页

作者： TANG Xin ma zhaofeng NIU Xinxin YANG Yixian Information Security Center Beijing University of Posts and Telecommunications Beijing National Security Science and Technology Co. Ltd

A novel compressive sensing-based audio semi-fragile zero-watermarking algorithm is proposed in this paper. This algorithm transforms the original audio signal into the wavelet domain and applies compressive sensing theory to the approximation wavelet *** zero-watermarking is constructed according to the positive and negative properties of elements in the measurement vector. The experimental results show that the proposed algorithm is robust against common audio signal processing and fragile to malicious tampering. Compared with the existing algorithms, the proposed algorithm improves malicious tampering detection accuracy in common audio signal processing environments.

关键词： Compressive sensing Semi-fragile Zerowatermarking Tamper detection

A Video Watermarking DRM Method Based on H.264 Compressed Domain with Low Bit-Rate Increasement

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Chinese Journal of Electronics 2016年第4期25卷 641-647页

作者： ma zhaofeng HUANG Jianqing JIANG Ming NIU Xinxin Information Security Center of Beijing University of Posts and Telecommunications Library of Beijing University of Posts and Telecommunications Audio and Video Department the Third Research Institute of China Electronics Technology Group Corporation

It gets more and more important for video copyright protection,it is necessary to provide efficient H.264 compression domain watermarking for video Digital rights management(DRM).A new watermarking method based on H.264 compressed domain is proposed for video DRM,in which the embedding and extracting procedure are performed using the syntactic elements of the compressed bit *** this way,complete decoding is unnecessary in both embedding and extracting *** on the analysis of the time and space,some appropriate sub-blocks are selected for embedding watermarks,increasing watermark robustness while reducing the declination of the visual *** order to avoid bit-rate increasing and strengthen the security of the proposed video watermarking scheme,only a set of nonzero coefficients quantized in different parts of macroblocks is chosen for inserting *** experiment results show the proposed scheme can achieve excellent robustness against some common attacks,the proposed scheme is secure and efficient for video content DRM protection.

关键词： Video watermarking H.264 Temporal quality Compressed domain watermarking

Robust Audio Watermarking Algorithm Based on Empirical Mode Decomposition

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Chinese Journal of Electronics 2016年第6期25卷 1005-1010页

作者： TANG Xin ma zhaofeng NIU Xinxin YANG Yixian Information Security Center Beijing University of Posts and Telecommunications Department of Electronic Engineering Tsinghua University

A novel robust audio watermarking algorithm based on empirical mode decomposition is *** intrinsic feature of the final residual decomposed from the audio frame is selected to embed watermark and the algorithm works by shifting each element of the final residual to make its sum greater or less than 0. The experimental results show that the proposed algorithm does not change the property of the final residual after embedding watermark and the watermark is robust against various kinds of attacks. Compared with existing classic algorithms based on Empirical mode decomposition(EMD), the proposed algorithm largely improves both the robustness and imperceptibility of watermarking.

关键词： Audio watermarking Empirical mode decomposition(EMD) Final residual Intrinsic mode decomposition