Wider adoption of cloud storage services by organizations has been hindered by security and privacy issues. A consequence of storing data on the cloud is that, by its very nature, the storage infrastructure is not owned by the same organization that owns the data.
In addition, the data of one user is stored along with that of many others. Traditional schemes for ensuring security can only protect data privacy by sacrificing convenient operations such as searching and sharing.
Now, Shu Qin Ren and his colleague Khin Mi Mi Aung at the A*STAR Data Storage Institute in Singapore have devised a scheme that would not only allow organizations to store data on the cloud without loss of privacy but also permit searching and sharing of the data1. The system is able to preserve the benefit of the cloud’s specialized low-cost storage infrastructure while overcoming its current privacy and flexibility limitations. “The scheme may potentially push forward the wider adoption of cloud storage usage for organizations,” says Ren.
The solution proposed by the researchers involves a central ‘key manager’, who specifically manages data authentication and access authorization. In their scheme, data stored on the cloud is encrypted by its owner and hence is indecipherable to anyone else — including the cloud storage provider. A secret key required to unlock the encryption is generated and kept by the owner, who also determines an access policy for other users. This policy is implemented by the key manager, who generates a second access key, which is then passed back to the owner. Next, the owner wraps the original encryption key in this second layer of protection. The key manager is then able to pass on the second ‘public’ key to authorized third parties to allow them to access the data.
Under traditional privacy schemes, the owner manages both the encryption of and access to their data. Sharing with a third party typically involves retrieval and decryption of the data by the owner and therefore some loss of privacy. Under Ren and Aung’s scheme — entitled ‘Privacy Preserved Data Sharing’ — the third party only deals with the key manager and, after authorization, receives the public key without interacting with the data’s owner, thus allowing privacy to be maintained.
“The research team is now building a secure data searching and sharing prototype to test on structured data such as in databases,” says Ren. “The next step is to support unstructured data.”
The A*STAR-affiliated researchers contributing to this research are from the Data Storage Institute
Ren, S. Q. & Aung, K. M. M. PPDS: Privacy Preserved Data Sharing scheme for cloud storage. International Journal of Advancements in Computing Technology 4, 493–499 (2012).
Ultra-precise chip-scale sensor detects unprecedentedly small changes at the nanoscale
18.01.2017 | The Hebrew University of Jerusalem
Data analysis optimizes cyber-physical systems in telecommunications and building automation
18.01.2017 | Fraunhofer-Institut für Algorithmen und Wissenschaftliches Rechnen SCAI
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences