Cryptographic Role-Based Access Control, Reconsidered

Liu, B., Michalas, A. and Warinschi, B. 2022. Cryptographic Role-Based Access Control, Reconsidered. 16th International Conference on Provable and Practical Security (ProvSec’22). Nanjing, China 11 - 12 Nov 2022 Springer. https://doi.org/10.1007/978-3-031-20917-8_19

TitleCryptographic Role-Based Access Control, Reconsidered
AuthorsLiu, B., Michalas, A. and Warinschi, B.
TypeConference paper
Abstract

A significant shortcoming of traditional access control mechanisms is their heavy reliance on reference monitors. Being single points of failure, monitors need to run in protected mode and have permanent online presence in order to handle all access requests. Cryptographic access control offers an alternative solution that provides better scalability and deployability. It relies on security guarantees of the underlying cryptographic primitives and the appropriate key distribution/management in the system. In order to rigorously study security guarantees that a cryptographic access control system can achieve, providing formal security definitions for the system is of great importance, since the security guarantee of the underlying cryptographic primitives cannot be directly translated into those of the system.

In this paper, we follow the line of the existing studies on the cryptographic enforcement of Role-Based Access Control (RBAC). Inspired by the study focusing on the relation between the existing security definitions for such systems, we identify two types of attacks not described in the existing works. Therefore, we propose two new security definitions with the goal of appropriately modeling cryptographic enforcement of Role-Based Access Control policies and studying the relation between our new definitions and the existing ones. In addition, we show that the cost of supporting dynamic policy updates is inherently expensive by presenting two lower bounds for such systems that guarantee correctness and secure access.

KeywordsApplied Cryptography
Cryptographic Access Control
Year2022
Conference16th International Conference on Provable and Practical Security (ProvSec’22)
PublisherSpringer
Accepted author manuscript
File Access Level
Open (open metadata and files)
Publication dates
Published07 Nov 2022
JournalLecture Notes in Computer Science
Journal citation13600, pp. 282-289
Book titleProvSec 2022: Provable and Practical Security
ISBN9783031209161
9783031209178
Digital Object Identifier (DOI)https://doi.org/10.1007/978-3-031-20917-8_19

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