Department of Computer Science, Shantou University, Shantou, China.
PLoS One. 2024 Mar 4;19(3):e0286087. doi: 10.1371/journal.pone.0286087. eCollection 2024.
The fundamental technology behind bitcoin, known as blockchain, has been studied and used in a variety of industries especially in finance. The security of blockchain is extremely important as it will affects the assets of the clients as well as it is the lifeline feature of the entire system that needs to be guaranteed. Currently, there is a lack of a methodical approach to guarantee the security and dependability of the private key during its whole life. Furthermore, there is no quick, easy, or secure way to create the encryption key. A biometric-based private key encryption and management framework (BPKEM) for blockchain is proposed not only to solve the private key lifecycle manag- ement problem, but also it maintains compatibility with existing blockchain systems. For the problem of private key encryption, a biometric-based stable key generation method is proposed. By using the relative invariance between facial and fingerprint feature points, this measure can convert feature points into stable and distinguishable descriptors, then using a reusable fuzzy extractor to create a stable key. The correct- ness and efficiency of the newly proposed biometric-based blockchain encryption tech- nique in this paper has been validated in the experiments.
比特币背后的核心技术，即区块链，已经在多个行业进行了研究和应用，尤其是在金融领域。区块链的安全性至关重要，因为它不仅会影响到客户的资产，还关系到整个系统的生命线，需要得到保障。目前，缺乏一种系统的方法来保证私钥在整个生命周期内的安全性和可靠性。此外，也没有快速、简便、安全的方法来创建加密密钥。针对区块链的基于生物特征的私钥加密和管理框架（BPKEM）不仅解决了私钥生命周期管理的问题，而且还保持了与现有区块链系统的兼容性。对于私钥加密的问题，本文提出了一种基于生物特征的稳定密钥生成方法。通过利用面部和指纹特征点之间的相对不变性，该方法可以将特征点转换为稳定且可区分的描述符，然后使用可重用的模糊提取器创建稳定的密钥。在实验中验证了本文提出的基于生物特征的区块链加密技术的正确性和效率。
