E.Deepika,V.Geetha
1PG Student STET Women’s college, mannargudi
2Professor of CS department, STET Women’s college,
mannargudi
The publish/subscribe (pub/sub) communication paradigm
has gained high popularity because of its inherent decoupling of publishers
from subscribers inters of time, space, and synchronization. Publishers inject
information into the pub/sub system, and subscribers specify the events of
interest by means of subscriptions. Authentication of publishers and subscribers is
difficult to achieve due to the loose coupling of publishers and subscribers.
Likewise, confidentiality of events and subscriptions conflicts with
content-based routing. This paper presents a novel approach to provide
confidentiality and authentication in a broker-less content-based
publish/subscribe system. The authentication of publishers and subscribers as
well as confidentiality of events is ensured, by adapting the pairing-based
cryptography mechanisms, to the needs of a publish/subscribe system.
Furthermore, an algorithm to cluster subscribers according to their
subscriptions preserves a weak notion of subscription confidentiality. In addition
to our previous work this paper contributes use of searchable encryption to
enable efficient routing of encrypted events, multi credential routing a new
event dissemination strategy to strengthen the weak subscription
confidentiality, and thorough analysis
of different attacks on subscription confidentiality. The overall approach
provides fine-grained key management and the cost for encryption, decryption,
and routing is in the order of subscribed attributes. Moreover, the evaluations
show that providing security is affordable throughput of the proposed
cryptographic primitives, and delays
incurred during the construction of the publish/subscribe overlay and the event
dissemination.
