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An attribute based encryption scheme capable of handling multiple authorities was recently proposed by Chase. The scheme is built upon a single-authority attribute based encryption scheme presented earlier by Sahai and Waters. Chase's construction uses a trusted central authority that is inherently capable of decrypting arbitrary ciphertexts created within(More)
In this work we discuss security issues and challenges in the emerging technologies for storing biometric templates securely. Several of the previously proposed schemes are analyzed and are shown to have weaknesses in several practical scenarios. We provide a generalization of the observed insecurities and establish a better security model under which(More)
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