Securely accessing encrypted cloud storage from multiple devices

Thumbnail Image

Files

master_Nguyen_Long_2015.pdf (2.25 MB)

URL

Journal Title

Journal ISSN

Volume Title

Perustieteiden korkeakoulu | Master's thesis
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.

Authors

Date

2015-12-14

Department

Major/Subject

Mobile Computing, Services and Security

Mcode

SCI3045

Degree programme

Master's Programme in Mobile Computing - Services and Security

Language

en

Pages

97

Series

Abstract

Cloud storage services like Dropbox, Google Drive and OneDrive are increasingly popular. They allow users to synchronize and access data from multiple devices. However, privacy of cloud data is a concern. Encrypting data on client-side before uploading it to cloud storage is an effective way to ensure data privacy. To allow data access from multiple devices, current solutions derive the encryption keys solely from user-chosen passwords which result in low entropy keys. In this thesis, we present OmniShare, the first scheme to allow client-side encryption with high-entropy keys combined with an intuitive key distribution mechanism enabling data access from multiple devices. It uses a combination of out-of-band channels and cloud storage as a communication channel to ensure minimal and consistent user actions during key distribution. Furthermore, OmniShare allows the possibility of reducing communication overhead for updating encrypted data. OmniShare is freely available on popular platforms.

Description

Supervisor

Asokan, Nadarajah

Thesis advisor

Tamrakar, Sandeep

Keywords

cloud storage, key distribution, encryption, usability, synchronization

Other note

Citation

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201512165566

Collections

[dipl] Perustieteiden korkeakoulu / SCI