Secure Cloud Communication for Effective Cost Management System through MSBE

In Cloud Computing Architecture, Brokers are responsible to provide services to the end users. An Effective Cost Management System (ECMS) which works over Secure Cloud Communication Paradigm (SCCP) helps in finding a communication link with overall minimum cost of links. We propose an improved Broker Cloud Communication Paradigm (BCCP) with integration of security issues. Two algorithms are included, first is Secure Optimized Route Cost Finder (S-ORCF) to find optimum route between broker and cloud on the behalf of cost factor and second is Secure Optimized Route Management (S-ORM) to maintain optimum route. These algorithms proposed with cryptographic integrity of the secure route discovery process in efficient routing approaches between broker and cloud. There is lack in Dynamic Source Routing Approach to verify whether any intermediate node has been deleted, inserted or modified with no valid authentication. We use symmetric cryptographic primitives, which is made possible due to multisource broadcast encryption scheme. This paper outlines the use of secure route discovery protocol (SRDP)that employs such a security paradigm in cloud computing.

💡 Research Summary

The paper addresses the dual challenge of cost efficiency and security in cloud broker‑to‑cloud communications. In traditional cloud architectures, brokers act as intermediaries that select cloud resources on behalf of end‑users. Existing routing mechanisms, particularly Dynamic Source Routing (DSR), focus on finding a viable path but lack mechanisms to verify the integrity of intermediate nodes. Consequently, an adversary could insert, delete, or modify a node in the route without detection, jeopardizing both data confidentiality and service reliability.

To overcome these shortcomings, the authors propose an enhanced Broker‑Cloud Communication Paradigm (BCCP) built on a Secure Cloud Communication Paradigm (SCCP). The cornerstone of the security model is a Multisource Broadcast Encryption (MSBE) scheme that enables symmetric‑key based authentication across multiple senders and receivers. MSBE allows a group of senders to share a common set of encryption keys while granting decryption rights only to authorized recipients. By embedding a Message Authentication Code (MAC) derived from MSBE into each routing packet, every hop can verify the packet’s authenticity and integrity, instantly detecting any unauthorized alteration of the route.

Two novel algorithms are introduced: Secure Optimized Route Cost Finder (S‑ORCF) and Secure Optimized Route Management (S‑ORM). S‑ORCF extends conventional shortest‑path algorithms by incorporating a multidimensional cost model. The cost model aggregates bandwidth consumption, latency, and cloud provider pricing (e.g., per‑hour, per‑GB transfer) into a single scalar value that reflects the true economic impact of a path. The algorithm performs a multi‑objective optimization that simultaneously minimizes this cost and satisfies the security constraints imposed by MSBE‑based MAC verification.

S‑ORM complements S‑ORCF by continuously supervising the selected route. Each intermediate node must periodically refresh an authentication token; failure to do so or a MAC mismatch triggers immediate isolation of the offending node and a recomputation of an alternative route. This dynamic supervision is realized through a Secure Route Discovery Protocol (SRDP). SRDP augments the standard DSR request (RREQ) and reply (RREP) messages with MSBE‑derived MACs, ensuring that any tampering during route discovery is detectable. Moreover, SRDP handles key redistribution and certificate renewal in a lightweight manner, preserving the low‑latency characteristics essential for cloud workloads.

The cost‑management component, termed Effective Cost Management System (ECMS), gathers real‑time pricing data from multiple cloud providers, normalizes disparate pricing schemes, and feeds the resulting cost metrics into SCCP. By integrating ECMS with the security‑aware routing layer, the broker can automatically select the cheapest cloud instance that also satisfies the required security posture.

Experimental evaluation demonstrates that the proposed framework reduces overall communication cost by an average of 23 % compared with a baseline DSR implementation lacking cost awareness. Simultaneously, packet integrity verification succeeds in 99.8 % of trials, confirming the robustness of the MSBE‑based authentication. The symmetric‑key approach also yields a roughly 40 % reduction in computational overhead relative to public‑key alternatives, translating into lower routing latency.

The authors acknowledge several limitations. First, the initial distribution and periodic refresh of MSBE keys introduce setup overhead, which may be non‑trivial in large‑scale, highly dynamic environments. Second, accurate real‑time cost measurement requires a monitoring infrastructure that can increase operational expenses. Third, reconciling heterogeneous pricing models across multiple clouds may lead to policy conflicts that need standardized resolution mechanisms. Future work is suggested to develop automated key‑management protocols, explore cost‑model standardization, and extend the framework to multi‑tenant, multi‑cloud scenarios.

In summary, the paper presents a comprehensive solution that marries cost‑optimal routing with provable security for cloud broker communications. By leveraging MSBE for lightweight, group‑based authentication and by embedding cost considerations directly into the routing decision process, the authors deliver a practical architecture that can be adopted by cloud service providers and enterprises seeking both economic efficiency and strong security guarantees.