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A Data Preservation Method Based on Blockchain and Multidimensional Hash for Digital Forensics

机译：基于区块链和多维散列数字取证的数据保存方法

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摘要

Since digital forensics becomes more and more popular, more and more attention has been paid to the originality and validity of data, and data preservation technology emerges as the times require. However, the current data preservation models and technologies are only the combination of cryptography technology, and there is a risk of being attacked and cracked. And in the process of data preservation, human participation is also needed, which may lead to data tampering. To solve problems given, this paper presents a data preservation model based on blockchain and multidimensional hash. With the decentralization and smart contract characteristics of blockchain, data can be automatically preserved without human participation to form a branch chain of custody in the unit of case, and blockchain has good antiattack performance, which is the so-called 51% attack. Meanwhile, in order to solve the problem of data confusion and hard to query caused by the excessive number of cases, hash, cryptography, and timestamps are used to form a serialized main chain of custody. Because of the confliction problem of hash and judicial trial needs to absolutely guarantee the authenticity and validity of data, multidimensional hash is used to replace regular hash. In this way, the data preservation becomes an automatic, nonhuman-interventional process. Experiments have been carried out to show the security and effectiveness of the proposed model.
机译：由于数字取证变得越来越受欢迎，所以越来越多地关注数据的原始性和有效性，并且数据保存技术随着时间的需求而出现。然而，目前的数据保存模型和技术只是密码技术的组合，并且存在受到攻击和破解的风险。在数据保存过程中，还需要人类参与，这可能导致数据篡改。为了解决给出的问题，本文介绍了基于区块链和多维哈希的数据保存模型。随着区块链的权力下放和智能合同特征，数据可以自动保留，无需人类参与，在案例单位中形成一个分支链，而区块链具有良好的防抗攻击性能，这是所谓的51％的攻击。同时，为了解决数据混淆的问题，难以查询过多的情况，哈希，加密和时间戳用于形成序列化主链的监护。由于哈希和司法审判的冲突问题需要绝对保证数据的真实性和有效性，多维哈希被用来取代常规哈希。以这种方式，数据保存成为自动的非人介入过程。已经进行了实验以表明所提出的模型的安全性和有效性。

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