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Internet of Things (IoT) can be seen as a pervasive network of networks: numerous heterogeneous entities both physical and virtual interconnected with any other entity or entities through unique addressing schemes, interacting with each other to provide/request all kinds of services. Given the enormous number of connected devices that are potentially vulnerable, highly significant risks emerge around the issues of security, privacy, and governance; calling into question the whole future of IoT. During the data exchange, it is mandatory to secure the messages between sender and receiver to handle the malicious human based attacks. The main problem during Fingerprint based approaches is the computational overhead due to large real numbers required for Fingerprint and verification processes. This paper presents a light weight Shortened Complex Digital Fingerprint Algorithm (SCDSA) for providing secure communication between smart devices in human centered IoT. We have used less extensive operations to achieve Fingerprint and verification processes like human beings do Fingerprints on legal documents and verify later as per witness. It enhances the security strength to guard against traffic analysis attacks.

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