Abstract: Cloud
computing is anticipated to revolutionize the Information and
Communication Technology sector and has been a mainstream of research
over the last decade. The cloud computing, upsurges the capabilities of
the hardware resources by optimal and shared utilization. The above
mentioned features encourage the organizations and individual users to
shift their data, applications and services to the cloud. However, the
services provided by third-party cloud service providers entail
additional security threats.
Data
being one of the prime assets of the organizations must be protected
from all sorts of security threats. The data in the cloud is much more
vulnerable to risks in terms of confidentiality, integrity, and
availability in comparison to the conventional computing model. The ever
increasing number of users and applications leads to enhanced security
risks. Violation of integrity may also result from multi-tenant nature
of the cloud. Employee of SaaS providers, having access to information
may also act as a potential risk.
Considering
the paramount importance of data security in the cloud environment, we
propose methodologies towards the secure cloud storage services. We
propose methodologies to secure: (a) Single user data, (b) Group shared
data, and (c) approach security and performance collectively. We propose
Data Security for Cloud Environment with Semi-trusted third party
(DaSCE) protocol, a cloud storage security system that provide key
management, access control, and file assured deletion. Parts of keys are
stored at semi-trusted servers called key managers. The key management
is accomplished using ( k, n ) threshold secret sharing mechanism.
Finally, we present the DROPS methodology that collectively deals with
the security and performance in terms of retrieval time. The data file
is fragmented and the fragments are dispersed over multiple nodes. The
nodes are separated by means of T-coloring. The fragmentation and
dispersal ensures that no significant information is obtainable by an
adversary in case of a successful attack. .
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پنج‌شنبه 12 مرداد 1396 ساعت 13:05