EFFECTIVE KEY GENERATION FOR MULTIMEDIA AND WEB APPLICATION

NOVATEUR PUBLICATIONS
INTERNATIONAL JOURNAL OF INNOVATIONS IN ENGINEERING RESEARCH AND TECHNOLOGY [IJIERT]
ISSN: 2394-3696
VOLUME 2, ISSUE 4, APR.-2015
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EFFECTIVE KEY GENERATION FOR MULTIMEDIA AND WEB
APPLICATION
Mr. Sagar Sharad Bhuite
Department of Computer Science and Engg, College of Engg. Pandharpur
Solapur University, Solapur, India
Prof. Yoginath R. Kalshetty
Asst. Prof. in CSE Dept., College of Engg. Pandharpur
Solapur University, Solapur, India
ABSTRACT
The Effective Key Generation for Multimedia and Web Application is used as the core
component of many web and multimedia applications such as pay-TV, teleconferencing,
real-time distribution of stock market price and etc. The main challenges for secure multicast
are scalability, efficiency and authenticity. In this project, we propose a scalable, efficient,
authenticated group key agreement scheme for large and dynamic multicast systems. The
proposed key agreement scheme is identity-based which uses the bilinear map over the
elliptic curves. Compared with the existing system, the proposed system provides group
member authenticity without imposing extra mechanism. Furthermore, we give a scalability
solution based on the subgroups, which has advantages over the existing schemes. Security
analysis shows that our scheme satisfies both forward secrecy and backward secrecy.
INTRODUCTION
AIM OF THE PROJECT
A)Scalable, Efficient, Authenticated group key agreement scheme for large and dynamic
multicast systems.
B)The proposed key agreement scheme is identity-based which uses the bilinear map
over the elliptic curves.
C)To Provides Group Member Authenticity.
D)Scalability solution based on the subgroups.
E)To analyze security for forward secrecy and backward secrecy.
GENERAL INTRODUCTION
Effective Key Generation for Multimedia and Web Application provides an efficient way of
Group key Agreement in terms of Scalability and Authenticity between the Sub group
members and to other group members in the network. The Existing system have the
drawbacks such as the Group Controller takes all responsibilities of key generation, re keys
generation, message transmission to its sub group members and also to any other group
controllers. So lot of bottleneck’s to the group controller in the sub group.
The sub group’s members are not able to send information’s to any other subgroup at the
time of re keying process. So performance of the sub group degrades at that time. The re
keying process is done every time once a communication is completed between the users in
the same group or to any other group members. One of the main challenges for secure

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multicast is access control for making sure that only legitimate members of multicast group
have access to the group communication. In the passed two or three decades, cryptography
has become the well established means to solve the security problems in networking.
However, there are still a lot of difficulties for directly deploying cryptography algorithms
into multicasting environment as what has been done for unicasting environment.
The commonly used technique to secure multicast communication is to maintain a group key
that is known to all users in the multicast group, but is unknown to anyone outside the
group. Efficiently managing the group key is a difficult problem for large dynamic groups.
Each time a member is added to or evicted from the communication group, the group key
must be refreshed.
The members in the group must be able to compute the new group key efficiently, at the
same time forward and backward secrecy must be guaranteed. Because the group re keying
is very consumptive and frequently performed due to the nature of multicast communication,
the way to update it in a scalable and secure fashion is required.
LITERATURE REVIEW
We describe fast new algorithms to implement recent cryptosystems based on the Tate
pairing. In particular, our techniques improve pairing evaluation speed by a factor of about
55 compared to previously known methods in characteristic 3, and attain performance
comparable to that of RSA in larger characteristics. We also propose faster algorithms for
scalar multiplication in characteristic 3 and square root extraction over Fpm, the latter
technique being also useful in contexts other than that of pairing-based cryptography.
We construct two efficient Identity-Based Encryption (IBE) systems that admit selective
identity security reductions without random oracles in groups equipped with a bilinear map.
Selective-identity secure IBE is a slightly weaker security model than the standard security
model for IBE. In this model the adversary must commit ahead of time to the identity that it
intends to attack, whereas in an adaptive-identity attack the adversary is allowed to choose
this identity adaptively. Our _rst system|BB1|is based on the well studied decisional bilinear
Di_e-Hellman assumption, and extends naturally to systems with hierarchical identities, or
HIBE. Our second system|BB2|is based on a stronger assumption which we call the Bilinear
Di_e-Hellman Inversion assumption and provides another approach to building IBE
systems. Our rst system, BB1, is very versatile and well suited for practical applications: the
basic hierarchical construction can be efficiently secured against chosen-cipher text attacks,
and further extended to support efficient non-interactive threshold decryption, among others,
all without using random oracles.
Multicast communication is becoming the basis for a growing number of applications. It is
therefore critical to provide sound security mechanisms for multicast communication. Yet,
existing security protocols for multicast offer only partial solutions. We first present
taxonomy of multicast scenarios on the Internet and point out relevant security concerns.
Next we address two major security problems of multicast communication: source
authentication, and key revocation. Maintaining authenticity in multicast protocols is a much
more complex problem than for unicast; in particular, known solutions are prohibitively
inefficient in many cases. We present a solution that is reasonable for a range of scenarios.
Our approach can be regarded as a ‘midpoint’ between traditional Message Authentication
Codes and digital signatures. We also present an improved solution to the key revocation
problem.

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Secure and reliable group communication is an increasingly active research area by growing
popularity in group-oriented and collaborative application. One of the important challenges
is to design secure and efficient group key management. While centralized management is
often appropriate for key distribution in large multicast-style groups, many collaborative
group settings require distributed key agreement. The communication and computation cost
is one of important factors in the group key management for Dynamic Peer Group. I extend
TGDH (Tree-based Group Diffie-Hellman) protocol to improve the computational
efficiency by utilizing pairing-based cryptography. The resulting protocol reduces
computational cost of TGDH protocol without degrading the communication complexity.
PROBLEM DEFINITION AND SCOPE
In the Existing system we use Iolus approach proposed the notion of hierarchy subgroup for
scalable and secure multicast. In this method, a large communication group is divided into
smaller subgroups. Each subgroup is treated almost like a separate multicast group and is
managed by a trusted group security intermediary (GSI). GSI connect between the
subgroups and share the subgroup key with each of their subgroup members. GSIs act as
message relays and key translators between the subgroups by receiving the multicast
messages from one subgroup, decrypting them and then re multicasting to the next subgroup
after encrypting them by the subgroup key of the next subgroup. The GSIs are also grouped
in a top-level group that is managed by a group security controller (GSC).
When a group member joins or leaves only affect subgroup only while the
other subgroup will not be affected. It has the drawback of affecting data path. This occurs
in the sense that there is a need for translating the data that goes from one subgroup, and
thereby one key, to another. This becomes even more problematic when it takes into account
that the GSI has to manage the subgroup and perform the translation needed. The GSI may
thus become the bottleneck.
LIMITATIONS OF EXISTING SYSTEM
• The Group controller takes all responsibilities for the group such as key generation,
re keying process and message transfer to any other groups
• The group members are not able to communicate with any other groups during the re
keying process
• The Group controller maintains logical key tree where each nodes represents a key
encryption key. The root of the key tree is the group key used for encrypting data in
group communications and it is shared by all Users
RESULT
The advantages over the existing system are, we use an identity tree instead of key tree in
our scheme. Each node in the identity tree is associated with an identity. The leaf node’s
identity is corresponding to the user’s identity and the intermediate node’s identity is
generated by its children’s identity. Hence, in an identity tree, an intermediate node
represents a set users in the sub tree rooted at this node.

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The keys used in each subgroup can be generated by a group of key generation centers
(KGCs) in parallel. All the members in the same subgroup can compute the same subgroup
key though the keys for them are generated by different KGCs. This is a desirable feature
especially for the large-scale network systems, because it minimizes the problem of
concentrating the workload on a single entity.
ADVANTAGES OF PROPOSED SYSTEM
• The Group controller responsibilities are shared by the Group control intermediater
such as Re keying process and scalability of the group process
• Use the Identity tree based structure
• The group members are not affected by the key generation process when they are
willing to communicate with any other group members
• The Centralized key server used for key generation process and the KGC is also act
as a Router for group to group communication
• The Re keying process is done only to the particular group members not to the entire
group member.
CONCLUSION
The Proposed system is an efficient, authenticated, scalable key agreement for large and
dynamic multicast systems, which is based on the bilinear map. Compared with the Existing
system, we use an identity tree to achieve the authentication of the group member. Further, it
solve the scalability problem in multicast communications. Since a large group is divided
into many small groups. Each subgroup is treated almost like a separate multicast group with
its own subgroup key. All the keys used in each subgroup can be generated by a group of
KGC’s in parallel. The intuitively surprising aspect of this scheme is that, even the subgroup
controller aborts, it does not affect the users in this subgroup. Because every user in the
subgroup can act as a subgroup controller. This is a significant feature especially for the
mobile and ad hoc networks. From the security analysis we can see that our scheme satisfies
both forward and backward secrecy.
REFERENCES
[1]Liming Wang, and Chuan-Kun Wu,” Efficient Key Agreement for Large and Dynamic
Multicast Groups” in International Journal of Network Security, Vol.3, No.1, PP.8–17, July
2006 (http://isrc.nchu.edu.tw/ijns/)”
[2] P. S. L. M. Barreto, H. Y. Kim, and M. Scott, “Efficient algorithms for pairing-based
cryptosystems,” in CRYPTO 2002, LNCS 2442, pp. 354–368, 2002.
[3]P. S. L. M. Barreto, B. Lynn, and M. Scott, “On the selection of pairing-friendly groups,”
in SAC’2003, LNCS 3006, pp. 17–25, 2004.
[4] Blake, G. Seroussi, and N. Smart, Elliptic Curves in Cryptography, Cambridge
University Press, 2001.
[5] D.Boneh and X.Boyen, “Efficient selective-ID se-cure identity based encryption without
random oracles,” in Euro crypt 2004, LNCS 3027, pp. 223–238,2004.
[6] D. Boneh and M. Franklin, “Identity-based encryption from the weil pairing,” in
CRYPTO 2001, LNCS2139, pp. 213–229, 2001.

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[7] D. Boneh and J. Katz, “Improved efficiency for CCA-secure cryptosystems built using
identity-based encryption,” in CT-RSA 2005, LNCS 3376, pp. 87–103,2005.
[8] X. Boyen, “Multipurpose identity-based signcryption: a swiss army knife for identity-
based cryptography,” in CRYPTO 2003, LNCS 2729, pp. 382–398, 2003.
[9] R.Canetti, J.Garay, G.Itkis, K.Micciancio, M.Naor, and B. Pinkas, “Multicast security: a
taxonomy and some efficient constructions,” in INFOCOM99, pp. 708–716, 1999.
[10]Y. Kim, A.Perrig, and G.Tsudik, “Tree-based group key agreement,” ACM
Transactions on Information and System Security, vol. 7, no. 1, pp. 60–96, Feb.2004.

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