Efficient Rekeying
Framework for Secure Multicast with Diverse-Subscription-Period Mobile Users
ABSTRACT:
Group key management (GKM) in mobile communication
is important to enable access control for a group of users. A major issue in
GKM is how to minimize the communication cost for group rekeying. To design the
optimal GKM, researchers have assumed that all group members have the same
leaving probabilities and that the tree is balanced and complete to simplify
analysis. In the real mobile computing environment, however, these assumptions
are impractical and may lead to a large gap between the impractical analysis
and the measurement in real-life situations, thus allowing for GKM schemes to
incorporate only a specific number of users. In this paper, we propose a new
GKM framework supporting more general cases that do not require these
assumptions. Our framework consists of two algorithms: one for initial
construction of a basic key-tree and another for optimizing the key-tree after
membership changes. The first algorithm enables the framework to generate an
optimal key-tree that reflects the characteristics of users’ leaving
probabilities, and the second algorithm allows continual maintenance of
communication with less overhead in group rekeying. Through simulations, we
show that our GKM framework outperforms the previous one which is known to be
the best balanced and complete structure.
EXISTING SYSTEM:
Many commercial applications such as
PayTV, vehicular ad hoc network (VANET), and group signature require that only
legal users have access authority. Nowadays, because smart phones are becoming
popular, many mobile applications which need group communication such as DMB,
video conference, and online game have emerged.
For both security and efficiency, a
group key (GK) which is shared only by a group of mobile devices has been
employed for access control. A message for the group is encrypted by the GK and
transmitted only once. Then the transmitted message can be decrypted by only
group members having the GK. However, the GK is updated whenever the group
membership changes for forward and backward secrecy, which can cause a serious
problem with rekeying overhead. Hence, many researchers have proposed
variations of group key management (GKM), and have attempted to reduce the overhead
for group rekeying.
DISADVANTAGES
OF EXISTING SYSTEM:
1.
For both security and efficiency, a
group key (GK) which is shared only by a group of mobile devices has been
employed for access control. A message for the group is encrypted by the GK and
transmitted only once. Then the transmitted message can be decrypted by only
group members having the GK.
2.
The GK is updated whenever the group
membership changes for forward and backward secrecy, which can cause a serious
problem with rekeying overhead.
PROPOSED SYSTEM:
To overcome the disadvantages of the
existing system many researchers have proposed variations of group key
management (GKM), and have attempted to reduce the overhead for group rekeying.
Recently, as the number of smart phones
grows, many various membership-based applications are developing. Many of these
such as charged video streaming, online game and wireless access applications
rely on paid service. Due to the increase of short-period of subscription, the
group key is updated frequently, so that the communication overhead from
rekeying grows.
ADVANTAGES
OF PROPOSED SYSTEM:
ü For
GKM, one of the most important concerns is how to minimize the communication
overhead when the shared GK is updated among the subscribers
ü The
lower bound of the communication cost and accurately analyzes the communication
cost.
SYSTEM ARCHITECTURE:
SYSTEM CONFIGURATION:-
HARDWARE CONFIGURATION:-
ü Processor - Pentium –IV
ü Speed - 1.1
Ghz
ü RAM - 256
MB(min)
ü Hard Disk -
20 GB
ü Key Board -
Standard Windows Keyboard
ü Mouse - Two
or Three Button Mouse
ü Monitor - SVGA
SOFTWARE CONFIGURATION:-
ü Operating System : Windows XP
ü Programming Language :
JAVA
ü Java Version :
JDK 1.6 & above.
REFERENCE:
Young-Hoon Park, Dong-Hyun Je, Min-Ho Park†,
and Seung-Woo Seo† Member, IEEE-“Efficient Rekeying Framework for Secure
Multicast with Diverse-Subscription-Period Mobile Users”- IEEE TRANSACTIONS ON MOBILE COMPUTING 2013.
