基于Adaboost的人脸与虹膜融合识别

传统生物特征识别系统的识别率经常受到环境以及生物学特征的自身局限性影响。针对该不足,提出一种基于人脸与虹膜特征级融合的多模态生物识别系统,采用中心对称局部二值模式算子提取人脸和虹膜的纹理特征,将人脸特征与虹膜特征线性整合成混合特征向量,利用Adaboost算法从该混合特征向量中优选出一组最佳特征组合,从而构成强分类器。实验结果表明,该多模态系统相比单模态系统具有更好的鲁棒性。     

Enhanced biometric encryption algorithm for private key protection in BioPKI system

Protection of private key is the most critical part in public key infrastructure（PKI） system since it depends on the confidentiality of private key. Thread of password detection has been known as the vulnerability in this PKI system. Recently, studies have been conducted on Bio PKI system that uses the biometric information of users in order to replace the password type of private key protection in PKI system. However, Bio PKI system also has vulnerability in that biometric information used for protection of private key cannot be reused once it is stolen or lost. So, we propose the method to protect the private key using FIDSEQi which binds sequence to biometric information. The proposed method enhances reusability of biometric information and presents higher attack complexity than the method of authentication by cross matching single biometric information.     

基于纠缠辅助码的量子模糊承诺和生物认证

本文针对经典模糊承诺体制不能有效抵抗量子算法攻击的问题,在纠缠辅助量子纠错码的基础上,结合量子哈希构造一类新的量子模糊承诺体制.利用无需自对偶约束的量子纠错码空间构建模糊承诺集产生承诺阶段所需的码字,并对其施加用于模糊证明的加噪变换,有效抵抗量子傅立叶取样攻击;提出一种量子哈希,对随机量子序列进行混淆扩散后加密,实现信息论意义上的一次一密安全.据此构建的量子模糊承诺体制可有效抵抗量子图灵机攻击.该文还给出了基于量子模糊承诺的挑战响应生物认证方案,分别对量子模糊承诺和生物认证方案在量子计算环境下的安全性作了分析,证明了其安全性和有效性.     

基于分块和偏最小二乘的非接触式手掌静脉生物特征识别

研究了一种适用于非接触式图像采集的手掌静脉识别的子空间方法,解决了传统接触式采集容易传染疾病,非接触采集使同类图像差别增大导致识别性能不佳的问题.先采用分块算法对图像进行快速降维,再用偏最小二乘算法提取掌脉图像中灰度值变异大,且类别信息相关性最大的若干方向组成分类子空间,然后依据图像在此空间中的位置进行分类识别.应用自建掌脉图库和中科院自动化研究所图库进行实验分析,实验结果表明:与传统掌脉识别方法相比,该方法能有效地提高正确识别率,降低误拒率.两个图库中,该算法选择分块大小为4×4时的正确识别率分别达到99.98％,99.34％;误识率分别达到0.02％,0.66％;误拒率分别达到0.13％,0.60％;识别时间分别在0.03 s,0.04s之内.适用于安防、考勤等场合,具有实用价值.     

真菌毒素适配体筛选技术研究进展

真菌毒素遍布于粮食生产、贮藏、运输和加工等各个环节,其污染已经成为全球亟待解决的问题。对真菌毒素进行监测并配合使用各种有效的降毒手段,有助于真菌毒素污染问题的解决。目前,真菌毒素检测、监控和靶向降解所用识别元件多为抗体,但抗体存在价格昂贵、批次间差异性大、热稳定性差等缺点,限制了其应用,而适配体合成简单、热稳定性强、免疫原性小、几乎无批次间差异等优点,有望取代抗体,但目前有关适配体商业化应用仍旧很少。本文概括总结了以真菌毒素为靶标的适配体筛选技术及其所筛适配体情况,并分析了适配体商业化应用仍旧很少的原因,以及各种筛选技术所面临的问题和挑战,以期为真菌毒素适配体的筛选提供参考,促进粮食中真菌毒素污染问题的解决。     

生物特征识别标准新进展

介绍了ISO/IEC JTC1 SC37生物特征识别标准化分技术委员会最新进展,描述了若干重点标准.在此基础上,对我国该技术领域的标准化工作提出建议.     

Correlation-based identification approach for multimodal biometric fusion

Information fusion is a key step in multimodal biometric systems. The feature-level fusion is more effective than the score-level and decision-level method owing to the fact that the original feature set contains richer information about the biometric data. In this paper, we present a multiset generalized canonical discriminant projection (MGCDP) method for feature-level multimodal biometric information fusion, which maximizes the correlation of the intra-class features while minimizes the correlation of the between-class. In addition, the serial MGCDP (S-MGCDP) and parallel MGCDP (P-MGCDP) strategy were also proposed, which can fuse more than two kinds of biometric information, so as to achieve better identification effect. Experiments performed on various biometric databases shows that MGCDP method outperforms other state-of-the-art feature-level information fusion approaches.     

虹膜图像采集系统的设计

通过对人物识别和证实为基础的生物测定技术——人类虹膜的认识,以无危险性的生物测定技术为背景,利用一个机械可视系统,将虹膜通过CCD/CMOS成像器件,有效地进行摄录,并经过图案识别比较,从而实现对人物识别和证实。论文主要描述了该系统的虹膜成像方面的设计和操作问题。     

Two-factor authenticated key agreement protocol based on biometric feature and password

A new two-factor authenticated key agreement protocol based on biometric feature and password was proposed.The protocol took advantages of the user’s biological information and password to achieve the secure communication without bringing the smart card.The biometric feature was not stored in the server by using the fuzzy extractor technique,so the sensitive information of the user cannot be leaked when the server was corrupted.The authentication messages of the user were protected by the server’s public key,so the protocol can resist the off-line dictionary attack which often appears in the authentication protocols based on password.The security of the proposed protocol was given in the random oracle model provided the elliptic computational Diffie-Hellman assumption holds.The performance analysis shows the proposed protocol has better security.     

A biometric evaluation of the somatotherapies in schizophrenia.

"The purpose of this study is to examine the available analyzable data on the outcome of the shock therapies and psychosurgery in order to get an estimate of the effectiveness of these therapies in the treatment of schizophrenia, as it has been reported in the literature." In spite of the several limitations of these studies the following facts were revealed: in terms of immediate outcome, there is a distinct advantage for the treated groups vs. the untreated ones; in terms of long-range recovery the treated have generally not shown greater improvement over the untreated; specific therapies work better with patients whose illness is of short duration; and with better prognostic indicators the results of specific therapies would excel the outcome of the nonspecific therapies. 85-item bibliography. (PsycINFO Database Record (c) 2010 APA, all rights reserved)