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- W4289655260 abstract "In attribute-based access control, users with specific verified attributes will gain access to some particular data. Concerning the privacy of the users’ attributes, we study the problem of distributed attribute-based private access control (DAPAC) with multiple authorities. Each authority will learn and verify only one of the attributes.To investigate its fundamental limits, we introduce an information-theoretic DAPAC framework, with $N in {mathbb{N}},N geq 2$, replicated non-colluding servers (authorities), and some users. Each user has an attribute vector ${{mathbf{v}}^{ast}} = left( {v_1^{ast}, ldots,v_N^{ast}} right)$ of dimension N and is eligible to retrieve a message ${W^{{{text{v}}^{ast}}}}$, available on all servers. Each server n ∈ [N] can only observe and verify the n’th attribute of a user. In response, it sends a function of its authorized messages to the user. The system must satisfy the following conditions: (1) Correctness: the user with attribute vector v <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>*</sup> can retrieve his intended message ${W^{{{text{v}}^{ast}}}}$ from the servers’ responses, (2) Data Secrecy: the user will not learn anything about the other messages, (3) Attribute Privacy: each Server n learns nothing beyond attribute n of the user. The capacity of the DAPAC is defined as the ratio of the file size and the aggregated size of the responses, maximized over all feasible schemes. We obtain a lower bound on the capacity of this problem by proposing an achievable algorithm with rate $frac{1}{{2K}}$, where K is the size of the alphabet of each attribute." @default.
- W4289655260 created "2022-08-03" @default.
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- W4289655260 date "2022-06-26" @default.
- W4289655260 modified "2023-10-14" @default.
- W4289655260 title "Distributed Attribute-based Private Access Control" @default.
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- W4289655260 doi "https://doi.org/10.1109/isit50566.2022.9834564" @default.
- W4289655260 hasPublicationYear "2022" @default.
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