Title
IBBE-SGX: Cryptographic Group Access Control Using Trusted Execution Environments
Abstract
While many cloud storage systems allow users to protect their data by making use of encryption, only few support collaborative editing on that data. A major challenge for enabling such collaboration is the need to enforce cryptographic access control policies in a secure and efficient manner. In this paper, we introduce IBBE-SGX, a new cryptographic access control extension that is efficient both in terms of computation and storage even when processing large and dynamic workloads of membership operations, while at the same time offering zero knowledge guarantees. IBBE-SGX builds upon Identity-Based Broadcasting Encryption (IBBE). We address IBBE's impracticality for cloud deployments by exploiting Intel Software Guard Extensions (SGX) to derive cuts in the computational complexity. Moreover, we propose a group partitioning mechanism such that the computational cost of membership update is bound to a fixed constant partition size rather than the size of the whole group. We have implemented and evaluated our new access control extension. Results highlight that IBBE-SGX performs membership changes 1.2 orders of magnitude faster than the traditional approach of Hybrid Encryption (HE), producing group metadata that are 6 orders of magnitude smaller than HE, while at the same time offering zero knowledge guarantees.
Year
DOI
Venue
2018
10.1109/DSN.2018.00032
2018 48th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DSN)
Keywords
DocType
Volume
Access Control,TEE,SGX
Conference
abs/1805.01563
ISSN
ISBN
Citations 
1530-0889
978-1-5386-5597-9
3
PageRank 
References 
Authors
0.43
24
6
Name
Order
Citations
PageRank
Stefan Contiu130.43
Rafael Pires2485.64
Sebastien Vaucher361.85
Marcelo Pasin418117.37
Pascal A. Felber5108669.47
Laurent Réveillère625126.35