Paper 2022/051 Original: eprint.iacr.org/2022/051 ↗
Titanium: A Metadata-Hiding File-Sharing System with Malicious Security
Abstract
End-to-end encrypted file-sharing systems enable users to share files without revealing the file contents to the storage servers. However, the servers still learn metadata, including user identities and access patterns. Prior work tried to remove such leakage but relied on strong assumptions. Metal (NDSS '20) is not secure against malicious servers. MCORAM (ASIACRYPT '20) provides confidentiality against malicious servers, but not integrity. Titanium is a metadata-hiding file-sharing system that offers confidentiality and integrity against malicious users and servers. Compared with MCORAM, which offers confidentiality against malicious servers, Titanium also offers integrity. Experiments show that Titanium is 5x-200x faster or more than MCORAM.
Metadata
- Available format(s)
PDF- Category
- Applications
- Publication info
- Preprint.
- History
- 2022-01-18: last updated
- 2022-01-18: published
- Short URL
- https://ia.cr/2022/051
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2022/051,
author = {Weikeng Chen and Thang Hoang and Jorge Guajardo and Attila A. Yavuz},
title = {Titanium: A Metadata-Hiding File-Sharing System with Malicious Security},
howpublished = {Cryptology {ePrint} Archive, Paper 2022/051},
year = {2022},
url = {https://eprint.iacr.org/2022/051}
}