Abstract As for a biometric key, key management and biometric data security are both important. Existing bio-key generation methods are usually based on the biometric templates or features directly, it may expose user’s biometric data and will further make the biometric data permanently unusable for his secure identification recognitions. In this paper, a fingerprint bio-key generation approach using the feature distance is proposed. We utilize the relative distances among user’s fingerprint minutiae to generate a unique bio-key. Such bio-key is determinable and recoverable via the generation interval scheme. In addition, we use a two-layer error correcting technique to guarantee a better reliability during the data transmission. The experimental results positively show that our approach can ensure higher security of the bio-key and guarantee a good key regeneration rate. Besides, the storage of the original bio-key or any fingerprint template is unnecessary.

中文翻译：

---

基于生成间隔和两层纠错技术的生物特征密钥生成

摘要 对于生物识别密钥，密钥管理和生物识别数据安全都非常重要。现有的生物密钥生成方法通常直接基于生物特征模板或特征，这可能会暴露用户的生物特征数据，并进一步使生物特征数据永久无法用于他的安全身份识别。在本文中，提出了一种使用特征距离的指纹生物密钥生成方法。我们利用用户指纹细节之间的相对距离来生成唯一的生物密钥。此类生物密钥可通过生成间隔方案确定和恢复。此外，我们使用两层纠错技术来保证数据传输过程中更好的可靠性。实验结果积极地表明，我们的方法可以确保生物密钥的更高安全性，并保证良好的密钥再生率。此外，无需存储原始生物密钥或任何指纹模板。