International Journal For Multidisciplinary Research

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An Efficient Technique for Secure Message Broadcasting

Author(s) C.Althaf, Vasantha Venu Gopal Sudheer, Manideep Kandepu, Filia Mary A S, E. Indhuja
Country India
Abstract In contemporary cryptographic discourse, traditional
broadcast encryption (BE) schemes have emerged as a robust
method for secure broadcasting to specific subsets of
members within a group. However, these schemes typically
necessitate the involvement of a trusted entity for the
distribution of decryption keys, which introduces
vulnerabilities. Conversely, group key agreement (GKA)
protocols offer a means of negotiating a shared encryption
key among a group of members across open networks, thereby
ensuring that only authorized group members possess the
capability to decrypt ciphertexts encrypted under this key. Nonetheless, GKA protocols lack the flexibility to allow
senders to selectively exclude specific members from
decrypting ciphertexts. In response to this dichotomy, we present a pioneering hybrid
cryptographic primitive termed Contributory Broadcast
Encryption (ConBE), which ingeniously amalgamates the
strengths of both BE and GKA paradigms. In this innovative
approach, a cohesive group of members collaboratively
negotiates a shared public encryption key, with each member possessing an associated decryption key. This setup empowers
senders, upon accessing the public group encryption key, to
exercise granular control over decryption, selectively
restricting access to a subset of designated recipients. Expounding upon this foundational framework, we introduce
a ConBE scheme distinguished by succinct ciphertexts, thus
optimizing computational efficiency without compromising on
security guarantees. Through rigorous analysis, our scheme is
proven to be fully collusion-resistant under the decision n- Bilinear Diffie-Hellman Exponentiation (BDHE) assumption, thereby ensuring robust security within the standard
cryptographic model. Furthermore, in a complementary contribution, we unveil a
novel BE scheme endowed with aggregatable properties, which hold paramount significance in the construction of
advanced cryptographic protocols. These properties facilitate
the aggregation of decryption rights across multiple
ciphertexts, thereby enhancing scalability and versatility in
cryptographic applications. Our comprehensive exploration and formalization of ConBE, alongside the development of efficient cryptographic schemes, represent a significant stride forward in the realm of secure
data transmission and access control mechanisms. This
endeavor underscores our commitment to advancing
cryptographic methodologies that reconcile security, efficiency, and flexibility in contemporary distributed
computing environments
Keywords Broadcast Encryption (BE), Group Key Agreement (GKA).
Field Computer
Published In Volume 6, Issue 2, March-April 2024
Published On 2024-03-23
Cite This An Efficient Technique for Secure Message Broadcasting - C.Althaf, Vasantha Venu Gopal Sudheer, Manideep Kandepu, Filia Mary A S, E. Indhuja - IJFMR Volume 6, Issue 2, March-April 2024. DOI 10.36948/ijfmr.2024.v06i02.14240
DOI https://doi.org/10.36948/ijfmr.2024.v06i02.14240
Short DOI https://doi.org/gtn322
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