Abstract

As people become more conscious of private information security and advancements in Electrocardiogram (ECG) identity identification technology, the need to encrypt private data intensifies. New wearable medical devices continuously gather vast amounts of personal health data, underscoring the urgency of safeguarding privacy. This paper focuses on encrypting and decrypting rich characteristic signals like ECG. It delves into the core aspects, including the logic circuit diagram of a four-bit digit absolute comparator using Complementary Metal Oxide Semiconductor (CMOS) technology and optimizing delay through logic effort to reduce power consumption. XOR gates and other gate circuits, as well as complement subtraction principles, are employed in building logic gates. Calculating delay involves selecting the longest critical path and determining the specific parameters (g, h, and p) for each logic gate. Subsequently, energy consumption is computed using a formula, revealing a trade-off between energy and delay. After optimization, the circuit's energy consumption is 184.832, and the delay is 34.13. In summary, the 4-bit absolute value detector plays a crucial role in encryption, addressing the growing concern for privacy and data security.

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