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- W2777020618 abstract "We take a critical look at established security definitions for predicate encryption (PE) with public index under chosen-plaintext attack (CPA) and under chosen-ciphertext attack (CCA). We identify three different formalizations of key handling in the literature, implicitly assumed to lead to the same security notion. Contrary to this assumption, we prove that the corresponding models result in two different security notions under CPA and three different security notions under CCA. Similarly to the recent results for PKE and conventional key-encapsulation mechanism (KEM), we analyze subtleties in the security definitions for PE and predicate key-encapsulation mechanism (P-KEM) regarding the so-called “no-challenge-decryption” condition. While the results for PE and PKE are similar, the results for P-KEM significantly differ from the corresponding results for conventional KEM. As a consequence of our work, we suggest security definitions for PE and P-KEM under different attack scenarios." @default.
- W2777020618 created "2018-01-05" @default.
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- W2777020618 date "2017-01-01" @default.
- W2777020618 modified "2023-10-01" @default.
- W2777020618 title "Subtleties in Security Definitions for Predicate Encryption with Public Index" @default.
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- W2777020618 doi "https://doi.org/10.1007/978-3-319-72453-9_35" @default.
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