Implementing blockchain techniques has enabled secure smart trading in many realms, e.g. neighboring energy trading. However, trading information recorded on the blockchain also brings privacy concerns. Attackers can utilize data mining algorithms to obtain users' privacy, specially, when the user group is located in nearby geographic positions. In this paper, we present a consortium blockchain-oriented approach to solve the problem of privacy leakage without restricting trading functions. The proposed approach mainly addresses energy trading users' privacy in smart grid and screens the distribution of energy sale of sellers deriving from the fact that various energy trading volumes can be mined to detect its relationships with other information, such as physical location and energy usage. Experiment evaluations have demonstrated the effectiveness of the proposed approach.
Blockchain Technology Applications and Security
Smart Grid Security and Resilience
Advanced Steganography and Watermarking Techniques
Kazi Md. Rokibul Alam, Shinsuke Tamura, Sazia Rahman, Yasuhiko Morimoto
This paper improves the performance of the revised-simplified verifiable re-encryption mixnet (R-SVRM) based e-voting scheme by introducing confirmation numbers (CNs) that are used in the CN based e-voting scheme. Although CN based and R-SVRM based schemes had made e-voting schemes more practical by excluding zero knowledge proof (ZKP) that requires large volume of computations, still they are not efficient enough. Namely, the CN based scheme adopts RSA encryption functions that are not probabilistic or commutative, therefore to satisfy essential requirements of elections, extra random factors are necessary for individual votes, election authorities must sign on votes and they must keep encryption keys as their secrets. On the other hand, although the R-SVRM based scheme uses ElGamal encryption functions that are probabilistic and commutative, vote forms in it is complicated, i.e., vote forms consist of at least 3 items and they include information about candidates as exponents. The improved scheme simplifies vote forms by exploiting CNs, and extensively reduces the number of operations required for individual votes. Also, the scheme successfully satisfies all essential requirements of e-voting systems, i.e., it is endowed with features about privacy, robustness, accuracy, incoercibility and fairness as CN based and R-SVRM based schemes are.
Internet Traffic Analysis and Secure E-voting
Cryptography and Data Security
Advanced Steganography and Watermarking Techniques
With the development of the network, the number of digital productions is increasing rapidly and produce the demand for copyright protection of them. However, for a long time, both technological and institutional efforts have made some progress, they have not solved this problem very well. The phenomenon of infringement and piracy is still common among the network. In recent years, with the emergence of blockchain, it is hopeful to propose an excellent solution for this problem by taking its trustworthiness as a bridge and combining encryption technology and protection institution. Taking the idea of the Big Data Copyright Protection system as an example, this paper puts forward a detailed design scheme for the blockchain subsystem. The scheme shows the implementation of system's trustworthiness and a prototype is established using Hyperledger Fabric. We also take an experiment to test the performance of the core operations of the prototype with the observation of the resource utilization which proves that blockchain technology can meet most of the application demands. The goal of blockchain technology and continuous development are expected to bring better experience in the future.
Blockchain Technology Applications and Security
Advanced Steganography and Watermarking Techniques
Oksana Lukmanova, Elena Volkova, Anton Zabolotnyi, Aleksandr V. Gorelik
The paper presents the needs to improve the controlling systems in public utilities. One example was the use of blockchain technology in the work of the management company that supports the buildings. The method of such technology in the public utilities management system ensures the transparency of mutual obligations and information security between the consumer and the service provider. This leads to the embodiment in reality of the basic principles of effective relationships: the balance of interests of market participants and the openness of interaction.
Blockchain Technology Applications and Security
Advanced Steganography and Watermarking Techniques
As the Internet has developed, media distribution services have spread. However, these distribution services have many problems. The blockchain technology can solve these problems. In this paper, this blockchain is defined as media blockchain and is classified into two categories. One is content security that means securing content using blockchain. The other is content right information that means tracing and managing right information using blockchain. We introduce and analyze the media blockchain.
Advanced Steganography and Watermarking Techniques
In this work we investigate new computational properties that can be achieved by combining stateless trusted devices with public ledgers. We consider a hybrid paradigm in which a client-side device (such as a co-processor or trusted enclave) performs secure computation, while interacting with a public ledger via a possibly malicious host computer. We explore both the constructive and potentially destructive implications of such systems. We first show that this combination allows for the construction of stateful interactive functionalities (including general computation) even when the device has no persistent storage; this allows us to build sophisticated applications using inexpensive trusted hardware or even pure cryptographic obfuscation techniques. We further show how to use this paradigm to achieve censorship-resistant communication with a network, even when network communications are mediated by a potentially malicious host. Finally we describe a number of practical applications that can be achieved today. These include the synchronization of private smart contracts; rate limited mandatory logging; strong encrypted backups from weak passwords; enforcing fairness in multi-party computation; and destructive applications such as autonomous ransomware, which allows for payments without an online party.
Open access
Blockchain Technology Applications and Security
User Authentication and Security Systems
Advanced Steganography and Watermarking Techniques
Luca Brunese, Francesco Mercaldo, Alfonso Reginelli, Antonella Santone
Blockchain technology is one of the most important and disruptive technologies in the world. Multiple industries are adopting the blockchain technology to innovate the way they work. One of the industries that are looking to adopt the blockchain is the healthcare industry. In fact, the protection of the private information stored in hospital database is a critical issue. In this paper we propose a method aimed to protect information exchanged in hospital networks, with particular regard to magnetic resonance images. As required from blockchain technology, each host network must validate the transiting data network: we exploit formal equivalence checking to perform this validation, by modeling magnetic resonance images in terms of automata by exploiting radiomic features.
Open access
Blockchain Technology Applications and Security
Advanced Steganography and Watermarking Techniques
Smart city blueprint is constructed by increasing deployment of various Internet of Things devices. In this paper, we focus on data transmission and request for lane property right under the domain of an intelligent traffic system. IoT devices are usually deployed in a heterogeneous environment, with the natural gene of decentralization. Compared with cloud-based centralized architecture, in this paper, we introduce blockchain as a decentralized technology to let vehicles jointly collaborate without having to go through a central computing node authority. Data transmission between vehicles uses a peer-to-peer network in which every node communicates directly with every other node, verified by their relevant end-point nodes; lane's acquisition right is approved by all relevant vehicle nodes, as well as with consensus agreed upon via smart contract.
Blockchain Technology Applications and Security
Advanced Steganography and Watermarking Techniques
Yuhong Li, Rahim Rahmani, Nicolas Fouassier, Peik Stenlund · 5 authors
Smart Grid represents an efficient power transmission, distribution and management system. However, solutions for Smart Grid have raised security and privacy problems. Moreover, with the introduction of renewable energy resources, such as rooftop solar panels and small biogas plants, more and more electricity consumers are involved in the energy generation system. This may cause the power system unstable and/or the waste of the energy. Blockchain is a promising technology for solving these problems in the future energy system on account of its distributed trust, anonymity, data integrity and availability. In this paper, we propose a Blockchain-based architecture for Smart Grid. By using the proposed architecture, electricity consumers can be fully involved in the energy system and tracing the details of the energy they have consumed or generated. At the same time, the stability of the energy system can be kept, reducing the waste of the energy and potential hazard to the electrical equipment.
Open access
Blockchain Technology Applications and Security
Advanced Steganography and Watermarking Techniques
Blockchain technology is a highly popular yet highly misunderstood concept that is used today and in future applications. To enhance security and privacy, many applications adopt Blockchain. However, there are intrinsic drawbacks and emerging challenges. In this paper, we study popular security applications in Blockchain, present their major problems, as well as other challenges in Blockchain which allows future research to be conducted more efficiently.
Blockchain Technology Applications and Security
IoT and Edge/Fog Computing
Advanced Steganography and Watermarking Techniques