Samsung Electronics Co., Ltd.

Yunhyeok Choi

Bohdan Karpinskyy

Yongsoo Kim

Yongki Lee

Yong Ki Lee

Kyoungmoon Ahn

Mijung Noh

Jieun Park

Ihor Vasyltsov

Sang-wook Park

Heonsoo Lee

Juyeon Lee

Sumin Noh

A device is provided. The device includes: a plurality of physically unclonable function (PUF) cells, each of the plurality of PUF cells including at least one logic gate and being configured to generate an output signal based on at least one threshold level of the at least one logic gate; a signal generator configured to generate an input signal that is provided to each of the plurality of PUF cells; and a controller configured to, in a test mode, generate a control signal to control the signal generator to vary the input signal to control the plurality of PUF cells to output a plurality of output signals according to the input signal, and identify at least one weak PUF cell from among the plurality of PUF cells based on the output signal generated by the at least one weak PUF cell being an unstable output signal. The controller is further configured to disconnect the plurality of PUF cells from the signal generator in a normal mode.

Device and method for providing physically unclonable function with high reliability

A security device generates a key based on a physically unclonable function (PUF). The security device includes a physically unclonable function (PUF) block, an integrity detector, and a post processor. The PUF block outputs a plurality of first random signals and a plurality of corresponding first inverted random signals each having a logic level opposite to that of each of the plurality of corresponding first random signals. The integrity detector determines data integrity of the plurality of first random signals by using the plurality of first random signals and the plurality of corresponding first inverted random signals. The post processor generates a first row key that includes validity signals satisfying the data integrity.

Security device generating key based on physically unclonable function and method of operating the same

The present disclosure relates to an integrated circuit and a method of using the integrated circuit used to perform authentication using a challenge-response method. The challenge-response method includes an internal challenge generator, a physically unclonable function (PUF) block, and a response generator. The internal challenge generator is configured to receive a challenge, generate a plurality of internal challenges corresponding to the challenge, and generate at least one valid internal challenge among the plurality of internal challenges using screen information. The physically unclonable function (PUF) block is configured to generate a plurality of valid internal responses respectively changing according to the plurality of valid internal challenges. The response generator is configured to output a response generated using the plurality of valid internal responses.

Integrated circuit performing authentication using challenge-response protocol and method of using the integrated circuit

Systems and methods are described based on an integrated circuit that performs a challenge-response physically unclonable function (PUF). The PUF is used for challenge-response authentication. The integrated circuit includes a PUP block configured to output an n-bit internal response corresponding to a challenge that requests a response where n is an integer greater than 1 and a response generator configured to calculate a Hamming weight of the internal response and output the response by comparing the Hamming weight with at least one reference.

Integrated circuit and method for challenge-response physically unclonable function

A key enrollment method of a physically unclonable function (PUF) circuit including a plurality of PUF cells includes receiving a first level key from PUF cells, performing bit encoding on the first level key using a bit coding table based on Hamming weights of a plurality of bits in the first level key to generate a second level key, storing first helper data associated with the second level key in a non-volatile memory, performing block encoding on the second level key using an error correction code to generate a third level key, and storing second helper data associated with the third level key in the non-volatile memory.

Physically unclonable function circuits and methods of performing key enrollment in physically unclonable function circuits

A semiconductor device includes a physical unclonable function (PUF) cell array that includes PUF cells outputting first bits; a non-volatile memory that stores marking bits indicating whether the first bits are valid, first mask bits generated by masking second bits depending on parity of the second bits, and second mask bits generated by masking helper bits of the second bits, the second bits are valid bits from the first bits; an extracting unit that extracts the second bits from the first bits using the marking bits; an unmasking unit that unmasks the second bits using the first mask bits while receiving the second bits to provide the third bits; a bit decoding unit that compresses the third bits to fourth bits while receiving the third bits; and a block decoding unit that generates a security key by decoding the fourth bits and the second mask bits.

Semiconductor device generating security key, method of generating security key, and method of enrolling security key

A random number generator may include a first meta-stable inverter having an input terminal and an output terminal connected to each other and configured to generate a meta-stable voltage, an amplifier configured to amplify the meta-stable voltage, control circuitry configured to adjust a threshold voltage of the meta-stable voltage, and a sampler configured to generate a random number based on sampling the meta-stable voltage. The random number generator may be configured to be operated according to different modes of operation of a plurality of modes of operation. The amplifier may be a second meta-stable inverter configured to amplify the meta-stable voltage or include an input terminal and an output terminal that are connected to each other based on the random number generator being operated according to a first mode of operation or a second mode of operation, respectively, of the plurality of modes of operation.

Random number generators and methods of generating random numbers using adjustable meta-stable voltage

A random number generator includes a first oscillator configured to output a first oscillating signal having a first frequency. A second oscillator is configured to output a second oscillating signal having a second frequency different from the first frequency. A sampling unit is configured to receive the first and second oscillating signals. The sampling unit is configured to generate at least one entropy source by combining the received first and second oscillating signals. The sampling unit is configured to generate a random bit corresponding to the generated entropy source using a third oscillating signal. A third oscillator & control unit is configured to control the first and second oscillators and to generate the third oscillating signal. A frequency of the third oscillating signal is lower than the first and second frequencies.

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Hwaseong-si, South Korea

Yunhyeok Choi