Projects per year
Two attractive features of cloud storage services are the automatic synchronization of files between multiple client devices and the possibility to share files with other users. However, many users are concerned about the security and privacy of data stored in the cloud. Client-side encryption is an effective safeguard, but requires all client devices to have the decryption key. Current solutions derive these keys from user-chosen passwords, which are easily guessed. We present OmniShare, the first scheme to combine strong client-side encryption with intuitive key distribution mechanisms to enable access from multiple client devices and sharing between users. OmniShare uses a novel combination of out-of-band channels, including QR codes and ultrasonic communication, as well as the cloud storage service itself, to authenticate new devices. We describe the design and implementation of OmniShare, and explain how we evaluated its security (using formal methods), its performance (benchmarks), and its usability (cognitive walkthrough).
|Journal||IEEE INTERNET COMPUTING|
|Early online date||2018|
|Publication status||Published - 1 Aug 2018|
|MoE publication type||A1 Journal article-refereed|
- software engineering
- operating systems
- security and privacy protection
- access controls
- network-level security and protection
- networking and information technology
- computing milieux
- management of computing and information systems
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- 2 Finished
CloSer: Cloud-assisted Security Services
Kurnikov, A., Asokan, N., Paverd, A., Liu, J. & Tamrakar, S.
01/09/2016 → 31/08/2018
Project: Business Finland: Other research funding
Cloud Security Services - Pilven tietoturvapalvelut
Tamrakar, S., Paverd, A., Liu, J., Nyman, T., Asokan, N. & Bhattacharya, S.
01/07/2014 → 30/06/2016
Project: Academy of Finland: Other research funding