A high-efficiency reconfigurable ring oscillator puf circuit based on rram

Abstract

The invention discloses a high-efficiency reconfigurable ring oscillator PUF circuit based on RRAM, which includes an entropy source circuit and a response generating circuit; the first excitation is used as an address input to a row decoder to select at least one row as a feed of the ring oscillator. Electrical input, and enable the corresponding WL line at the same time; the second excitation is used as an address input to the column selector and write drive circuit, and the RRAM of any number of columns in each of the aforementioned conduction rows is selected to participate in the extraction of the entropy source; the response generation circuit It is used to amplify the random entropy source output by the RRAM Crossbar array, and finally manifests itself as a change in the oscillation frequency of the ring oscillator, and then by comparing the oscillation frequency of the same ring oscillator in different periods or the oscillation of different ring oscillators in the same period frequency to produce unique response values. The invention has good uniformity, uniqueness and reliability, strong configurability, and greatly reduces the circuit area.

Description

technical field [0001] The invention relates to the technical field of hardware security, in particular to an RRAM-based high-efficiency reconfigurable ring oscillator PUF circuit and a working method thereof. Background technique [0002] The rapid development of the Internet of Things has led to more attention to hardware security issues. The ubiquity of IoT terminal devices such as wearable devices, household appliances, and various sensors gives opponents more opportunities to attack terminal nodes. The traditional software encryption method needs to store the key in a non-volatile memory, and has a relatively complex encryption algorithm, which is vulnerable to physical attacks, such as side-channel attacks, etc., and the encryption algorithm can be used to realize energy consumption and operation in the process. Time, electromagnetic radiation and other information to crack the code. In addition, since IoT devices generally work in resource-constrained scenarios, tra...

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Problems solved by technology

However, this strong PUF circuit needs to use a non-volatile memory array and a 2T2R basic unit at the same time, which still needs to occupy a large area; its current comparison method has high requirements for the accuracy of the reading circuit; at the same time, its anti-attack ability for the model is only Realized through strong randomness, in fact, machine learning attacks cannot be completely avoided

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