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Low cost, power efficiency, and small size are the star features desired for Internet of Things (IoT) platform. This paper presents a novel hardware-based secure conference communication system rather than application-level algorithms existing in the literature. The proposed system depends on the fingerprint I-V characteristics of HfO ₂ memristor devices. The suggested novel nano-thick layer stack provides the memristors with highly probabilistic number and strength of filaments created in the devices. The experimental results reveal different I-V curves obtained for identical devices. In addition, within the same device, the set and reset operations result in new I-V characteristics, which can be used for session key generation. The distinctive features of the fabricated devices allow symmetric-key cryptography-based communication. Security analysis proves that mutual authentication, confidentiality, integrity, and …