Blockchain-Anchored Signature Rotation for Secure Lifecycle Management in Financial Systems

Author(s)	Sai Vamsi Kiran Gummadi
Country	United States
Abstract	The cryptographic signature lifecycle is a critical component of secure operations in financial systems. Static digital signature keys pose long-term security risks such as compromise, unauthorized use, and regulatory non-compliance. This paper proposes a blockchain-anchored framework for secure and auditable signature rotation. The proposed system utilizes smart contracts to record key transitions, enforce expiration, and preserve a verifiable signature lineage over time. We demonstrate that the architecture supports real-time auditing and integrity verification without compromising system throughput. The solution is scalable, tamper-proof, and compliant with FinTech governance policies, offering a robust mechanism for lifecycle key management.
Keywords	Blockchain, Digital Signatures, Key Rotation, Financial Systems, Smart Contracts, Signature Lifecycle, FinTech Security, Auditability.
Field	Engineering
Published In	Volume 16, Issue 4, October-December 2025
Published On	2025-10-24
DOI	https://doi.org/10.71097/IJSAT.v16.i4.9556
Short DOI	https://doi.org/hbb8fz

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International Journal on Science and Technology