Abstract :

Peer-to-peer (P2P) Cloud Environments Have Emerged As A Scalable Alternative To Traditional Centralized Cloud Infrastructures, Enabling Decentralized Data Storage, Sharing, And Service Collaboration Across Multiple Cloud Servers. However, Ensuring Secure Authentication And Key Agreement While Preserving Identity Anonymity Remains A Major Challenge In Such Distributed Settings. This Paper Proposes An Identity-Anonymous Authentication And Key Agreement Framework For Peer-to-Peer Cloud Systems, A Lightweight And Privacy-preserving Protocol Designed To Establish Secure Communication Between Cloud Peers Without Revealing Their Real Identities. The Framework Incorporates Elliptic Curve–based Certificate-free Cryptography, Enabling Mutual Authentication Between Cloud Servers Using Pseudonymous Identities Generated Through Symmetric Encryption. Users Act As A Temporary Trust Authority To Distribute Partial Private Keys, Eliminating Reliance On A Centralized Trusted Third Party. The Proposed Model Ensures Anonymous Identity Protection, Mutual Authentication, Resistance To Impersonation And Replay Attacks, Session-key Confidentiality, Perfect Forward Secrecy, And Traceability In Case Of Malicious Behavior. Security Analysis Demonstrates That The Framework Withstands Major Cryptographic Attacks And Satisfies Modern Security Requirements For Distributed Cloud Systems. Performance Evaluation Shows That The Proposed Scheme Significantly Reduces Computational And Communication Overhead Compared To Existing Solutions, Making It Well-suited For Real-time Peer-to-peer Cloud Interactions And Secure Cross-cloud Data Migration. This Identity-anonymous Authentication And Key Agreement Framework Therefore Enhances Privacy, Trust, And Security In Decentralized Cloud Ecosystems. Keywords Peer-to-Peer Cloud Computing, Anonymous Authentication, Key Agreement Protocol, Identity Privacy, Elliptic Curve Cryptography (ECC), Certificate-Free Cryptography, Secure Data Migration, Mutual Authentication, Cloud Security, Identity Traceability, Cross-Cloud Communication, PrivacyPreserving Framework.

Published:

18-12-2025

Issue:

Vol. 25 No. 12 (2025)

Page Nos:

306-316

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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