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- W2955106095 abstract "We introduce the notion of TMPS: Ticket-Mediated Password Strengthening, a technique for allowing users to derive keys from passwords while imposing a strict limit on the number of guesses of their password any attacker can make, and strongly protecting the users’ privacy. We describe the security requirements of TMPS, and then a set of efficient and practical protocols to implement a TMPS scheme, requiring only hash functions, CCA2-secure encryption, and blind signatures. We provide several variant protocols, including an offline symmetric-only protocol that uses a local trusted computing environment, and online variants that use group signatures or stronger trust assumptions instead of blind signatures. We formalize the security of our scheme by defining an ideal functionality in the Universal Composability (UC) framework, and by providing game-based definitions of security. We prove that our protocol realizes the ideal functionality in the random oracle model (ROM) under adaptive corruptions with erasures, and prove that security with respect to the ideal/real definition implies security with respect to the game-based definitions." @default.
- W2955106095 created "2019-07-12" @default.
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- W2955106095 date "2020-01-01" @default.
- W2955106095 modified "2023-09-26" @default.
- W2955106095 title "TMPS: Ticket-Mediated Password Strengthening" @default.
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- W2955106095 doi "https://doi.org/10.1007/978-3-030-40186-3_11" @default.
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