Garbled RAM Revisited Part I

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Provided by: International Association for Cryptologic Research
Topic: Storage
Format: PDF
The notion of garbled Random-Access Machines (garbled RAMs) was introduced by Lu and Ostrovsky (Eurocrypt 2013). It can be seen as an analogue of Yao's garbled circuits that allows a user to garble a RAM program directly, without performing the expensive step of converting it into a circuit. In particular, the size of the garbled program and the time it takes to create and evaluate it are only proportional to its running time on a RAM rather than its circuit size. Lu and Ostrovsky gave a candidate construction of this primitive based on Pseudo-Random Functions (PRFs).
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