Duane Morris LLP
RRAM-based monotonic counter
A circuit includes a memory array having a plurality of memory cells; a control logic circuit, coupled to the memory array, and configured to use a first voltage signal to cause a first memory cell of the plurality of memory cells to transition from a first resistance state to a second resistance state; a counter circuit, coupled to the control logic circuit, and configured to increment a count by one in response to the first memory cell's transition from the first to the second resistance state; and an encryption circuit, coupled to the counter circuit, configured to generate an encrypted value using an updated count provided by the counter circuit.
Taiwan Semiconductor Manufacturing Co., Ltd.
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Chung-Cheng Shih-Lien Linus Tong-Chern Yu-Der
Chou Lu Ong Chih