Privacy Leakage in Fuzzy Commitment Schemes
نویسنده
چکیده
Abstract In 1999 Juels and Wattenberg introduced the fuzzy commitment scheme. Fuzzy commitment is a particular realization of a binary biometric secrecy system with a chosen secret key. Three cases of biometric sources are considered, i.e. memoryless and totally-symmetric biometric sources, memoryless and input-symmetric biometric sources, and memoryless biometric sources. It is shown that fuzzy commitment is only optimal for memoryless totally-symmetric biometric sources and only at the maximum secret-key rate. Moreover, it is demonstrated that for memoryless biometric sources, which are not input-symmetric, the fuzzy commitment scheme leaks information on both the secret key and the biometric data.
منابع مشابه
EliMFS: Achieving Efficient, Leakage-resilient, and Multi-keyword Fuzzy Search on Encrypted Cloud Data
Motivated by privacy preservation requirements for outsourced data, keyword searches over encrypted cloud data have become a hot topic. Compared to single-keyword exact searches, multi-keyword fuzzy search schemes attract more attention because of their improvements in search accuracy, typo tolerance, and user experience in general. However, existing multi-keyword fuzzy search solutions are not...
متن کاملImage Compression in Iris-Biometric Fuzzy Commitment Schemes
Template protection targets privacy and security risks caused by unprotected storage of biometric data. Meeting properties of irreversibility and unlinkability template protection systems can be applied to secure existing records within biometric databases, i.e. without re-enrollment of registered subjects. The National Institute of Standards and Technology (NIST) demonstrated that iris recogni...
متن کاملIris-Biometric Fuzzy Commitment Schemes under Image Compression
With the introduction of template protection techniques, privacy and security of biometric data have been enforced. Meeting the required properties of irreversibility, i.e. avoiding a reconstruction of original biometric features, and unlinkability among each other, template protection can enhance security of existing biometric systems in case tokens are stolen. However, with increasing resolut...
متن کاملEnsuring patients' privacy in a cryptographic-based-electronic health records using bio-cryptography
Several recent works have proposed and implemented cryptography as a means to preserve privacy and security of patient’s health data. Nevertheless, the weakest point of electronic health record (EHR) systems that relied on these cryptographic schemes is key management. Thus, this paper presents the development of privacy and security system for cryptography-based-EHR by taking advantage of the ...
متن کاملTemplate Protection under Signal Degradation: A Case-Study on Iris-Biometric Fuzzy Commitment Schemes
Low intra-class variability at high interclass variability is considered a fundamental premise of biometric template protection, i.e. biometric traits need to be captured under favorable conditions in order to provide practical recognition rates. While performance degradations have been reported on less constraint datasets detailed studies based on a certain ground truth have remained evasive. ...
متن کامل