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- W1569408576 abstract "Understanding and modeling in the context of cryptographic systems (connecting physical protection of keys and cryptographic operation) is an emerging area with many missing issues and hard to understand aspects. In this work we initiate the study of out of cryptographic devices when the operation is inherently replicated in multiple locations . This setting (allowing the adversary access to at different locations) arises naturally in cases like protocols, where different parties activate the same cryptographic function, or in the case of a global service providers (like cloud operators) which need to replicate the cryptographic function to allow for accessible and responsive services. We specifically deal with the theoretical setting of leakage resilient (modeling as a bound associated with algorithmic steps), and in the most general model of continual on memory, randomness (and thus computation) with periods of operation and refresh of private keys between them.We first investigate public-key cryptography, and construct a multi-location resilient signature scheme (with unbounded number of locations) with optimal (i.e., total n (1−o (1)) leakage) in a period, and O (logn ) during updates (n is the key size). The new crucial issue behind our scheme is how to maintain at each location at the level of key in the single location variant, even under parallel adaptive at the different locations. We then construct a shared-symmetric-key authenticated session protocol that is resilient to on both the sender and the receiver, and tolerates O (logn ) bits of computation. We construct and utilize a single-location pseudorandom generator which is the first to tolerate continual with only an efficient pseudorandom function as a primitive component. This protocol highlights the importance of protocol level per message synchronization against adversaries. Interestingly, the construction is secure in spite of the entire randomness used in the refresh processes being publicly available." @default.
- W1569408576 created "2016-06-24" @default.
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- W1569408576 date "2012-01-01" @default.
- W1569408576 modified "2023-09-26" @default.
- W1569408576 title "Multi-location Leakage Resilient Cryptography" @default.
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- W1569408576 doi "https://doi.org/10.1007/978-3-642-30057-8_30" @default.
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