Query: Blockchain encryption technology

title: A Financial data security sharing solution based on blockchain technology and proxy re encryption technology
abstract: For the difficulties in sharing sensitive data among financial institutions, hidden dangers in data security, and high financial risk control costs, the paper proposed a secure data sharing solution based on blockchain technology with proxy re encryption technology. The solution consists of data sharing model and data sharing protocol. Firstly, using the distributed storage, decentralized management and non tampering characteristics of the blockchain, we designed a data security sharing model. The model sets access control strategies on the blockchain platform, and uses the blockchain platform and distributed databases to store encrypted data together to prevent sensitive data from being tampered with and leaked. The data sharing protocol uses identity based proxy re encryption technology and distributed key generation technology. The protocol selects proxy nodes by the proof of stake algorithm, and realizes data sharing among users by re encrypting sensitive data. The analysis of the solution discusses the correctness and security of the proposed scheme in terms of key generation.

title: MedSBA: a novel and secure scheme to share medical data based on blockchain technology and attribute based encryption
abstract: The development of Electronic Information Technology has made the Electronic Medical Record a commonly used approach to recording and categorizing medical patient data in databases of different hospitals and medical entities so that controlling the shared data is not possible for patients at all. The importance of medical data as possessions of people and the system leads us to be concerned about its security, privacy, and accessibility. How to store and controlling access to medical information is of the most important challenges in the electronic health area. The present paper provides a new, secure, and efficient scheme based on blockchain technology and attribute based encryption entitled "MedSBA" to record and store medical data, indicating that our proposed scheme protects user privacy and allows fine grain access control of medical patient data based on General Data Protection Regulation (GDPR) Private blockchains are used in MedSBA to improve the right to revoke instant access which is of the attribute based encryption challenges. The security and functionality of our proposed scheme are proved within a formal model and based on BAN logic, respectively; simulating the MedSBA scheme in the OPNET software as well as examining its computational complexity and storage indicates the efficiency of the present scheme.

title: Application of Blockchain News Production Based on Digital Encryption Technology
abstract: Blockchain technology provides a new logic for digital content production. At present, the Internet is a "one center, multi node" technology architecture. Blockchain constructs the underlying structure of "multi center, multi node" The block chain's digital encryption, backtracking, distributed account book and time stamp can solve the problems that the network data is easy to tamper with and not easy to save. Meanwhile, it provide a new technical support for the verification of news data. On the basis of Hasche Algorithm, the information after user's signature and authorization can be disclosed in the network, which can ensure the security of user's personal information. On the other hand, the application of blockchain in the field of news production can reshape the trust mechanism between communicators and users. This study uses observation and induction to describe the application scenarios of blockchain technology in the media industry. The application of blockchain technology will change the existing mode of news production and distribution. Specifically, Based on the main chain and parallel chain of DAG account book, this study considers that blockchain technology has a strong application value in the fields of news copyright protection, news source verification, advertising traffic fraud control and so on.

title: Blockchain based Dynamic Group Management for Multiple Keywords Searchable Encryption Technology
abstract: Searchable Encryption (SE) provides data online search function to users while protecting the data security and the user's query privacy. It has challenges of high computational and storage overhead that should be mitigated for a practical SE system. In this paper, we propose a blockchain based user management scheme for SE system that can decentralize bandwidth resource consumption. Meanwhile it prevents single point failure and enhances the security protection in order to prevent identity leakage, loss, tampering brought by TTP. It leverages blockchain to offer non central dynamic user management capability. Our theoretical analysis validates the feasibility and security. Further, experiments are carried out to demonstrate the SE effectiveness.

title: A Multi dimensional Adversary Analysis of RSA and ECC in Blockchain Encryption
abstract: During this current age of big data, the security of sensitive data in the cyberspace has become utmost important. Blockchain, as a new age technology, provides the necessary tools to ensure data integrity and data protection using some encryption. Smaller transaction size and higher transaction efficiency are the essential requirements of the blockchain. However, these requirements are closely related to the efficiency of the encryption algorithms that blockchain uses. In this paper, we have analyzed and compared the performance of Rivest Shamir Adleman (RSA) algorithm and Elliptic Curve Cryptography (ECC) algorithm that is most commonly used in blockchain by having a general consideration of a transaction size and transaction efficiency. We aim to provide a better understanding of the reason behind their extensive use in the blockchain. We hope that our evaluation and analysis of these two encryption algorithms can help promote the further development of blockchain.

title: Data encryption algorithm for e commerce platform based on blockchain technology
abstract: Aiming at the poor encryption effect existing in the data encryption algorithm of e commerce platform, and the data lost and distorted easily after encrypting, a data encryption algorithm based on blockchain technology is proposed in this paper. By analyzing the symmetric key algorithm and the public key algorithm, the DES encryption algorithm is described in detail. The two related technologies of digital envelopes and message authentication are analyzed to ensure the accuracy of the data and the one time encryption of the data. Based on this, in order to ensure the effectiveness of encryption, the process of asymmetric encryption algorithm based on chaotic sequence of neural network and asymmetric encryption algorithm based on neural network chaotic attractor are analyzed, and the security is tested. While ensuring the accuracy of data, it improves the effect of data encryption and realizes the encryption of e commerce platform data, which is to realize data encryption algorithm based on blockchain technology. Experimental results show that the~proposed algorithm can encrypt the data of e commerce platform, and the encryption process is relatively simple, the encryption effect is better, and the accuracy of the encrypted data is relatively high, which provides a theoretical basis for further research of the subject.

title: Authentication Encryption Based Security Services in Blockchain Technology
abstract: Without any involvement of third party, block chain has shown tremendous potential in establishing secure links with IoT.This technology can be widely used without using any centralized authority. By combining both the technologies throughput of the system can be enhanced. Due to its various applications it is being widely used in almost every field which makes it vulnerable to various attacks. In this paper, blockchain architecture along with its key properties has been discussed. Later part of paper comprises of various security principles such as confidentiality, integrity and availability, various attacks on network along with its countermeasures.

title: Data Encryption Transmission and Authentication Scheme Based on Blockchain Technology
abstract: Aiming at the security problem of data network transmission between smart car and server, based on the identity authentication technology in blockchain, a data encryption transmission and authentication scheme is proposed. Based on the identity authentication technology in the blockchain, the identity authentication of the car after data transmission is realized. Through the Diffie Hellman algorithm, the key exchange between the car and the server is realized. After combining the two technologies, the proposed scheme can not only realize the encrypted transmission of data, but also effectively carry out identity authentication, which greatly improves the security of data transmission between the car and the server.

title: A Blockchain Based Secure Image Encryption Scheme for the Industrial Internet of Things
abstract: Smart cameras and image sensors are widely used in industrial processes, from the designing to the quality checking of the final product. Images generated by these sensors are at continuous risk of disclosure and privacy breach in the industrial Internet of Things (IIoT) Traditional solutions to secure sensitive data fade in IIoT environments because of the involvement of third parties. Blockchain technology is the modern day solution for trust issues and eliminating or minimizing the role of the third party. In the context of the IIoT, we propose a permissioned private blockchain based solution to secure the image while encrypting it. In this scheme, the cryptographic pixel values of an image are stored on the blockchain, ensuring the privacy and security of the image data. Based on the number of pixels change rate (NPCR) the unified averaged changed intensity (UACI) and information entropy analysis, we evaluate the strength of proposed image encryption algorithm ciphers with respect to differential attacks. We obtained entropy values near to an ideal value of 8, which is considered to be safe from brute force attack. Encrypted results show that the proposed scheme is highly effective for data leakage prevention and security.

title: Blockchain based searchable encryption for electronic health record sharing
abstract: Data leakage in electronic health records (EHRs) could result in the compromise of patient privacy (e.g. medical conditions) Generally most data in EHRs remain unchanged once they are uploaded to the system; thus, blockchain can be potentially used to facilitate the sharing of such data. Different participating medical organizations and individuals (e.g. medical practitioners, hospitals, medical labs and insurance companies) can then access EHRs stored on the blockchain with a higher level of confidence. In this paper, a blockchain based searchable encryption scheme for EHRs is proposed. The index for EHRs is constructed through complex logic expressions and stored in the blockchain, so that a data user can utilize the expressions to search the index. As only the index is migrated to the blockchain to facilitate propagation, the data owners have full control over who can see their EHRs data. The use of blockchain technology ensures the integrity, anti tampering, and traceability of EHRs' index. Finally, the performance of the proposed scheme is evaluated from two aspects, namely in terms of the overhead for extracting the document IDs from EHRs and the overhead associated with conducting transactions on smart contract in Ethereum.