Silicon Laboratories Inc.

Javier Elenes

Dana John Taipale

Antonio Torrini

Scott Thomas Haban

Michael R May

Dan Bernard Kasha

Russell Croman

George Tyson Tuttle

Brian Douglas Green

John M Khoury

Alessandro Piovaccari

Peter Vancorenland

Younes Djadi

Gerald D Champagne

Chunyu Xin

Lawrence Der

Lokesh Duraiappah

Dave Anderton

G Tyson Tuttle

Michael Johnson

Sebastian Ahmed

David Le Goff

Emmanuel Gautier

John Allen

Christopher S Gregg

Lars Lydersen

Alex Hakkola

In an embodiment, an apparatus includes: a sensor to sense real world information; a digitizer coupled to the sensor to digitize the real world information into digitized information; a signal processor coupled to the digitizer to process the digitized information into an image; a discriminator coupled to the signal processor to determine, based at least in part on the image, whether the real world information comprises an anomaly, where the discriminator is trained via a generative adversarial network; and a controller coupled to the discriminator.

Detecting anomalous events in a discriminator of an embedded device

In one embodiment, an apparatus includes: a sensor to sense real world information; a digitizer coupled to the sensor to digitize the real world information into digitized information; a signal processor coupled to the digitizer to process the digitized information into a spectrogram; a neural engine coupled to the signal processor, the neural engine comprising an autoencoder to compress the spectrogram into a compressed spectrogram; and a wireless circuit coupled to the neural engine to send the compressed spectrogram to a remote destination, to enable the remote destination to process the compressed spectrogram.

Compressing information in an end node using an autoencoder neural network

Systems and methods are disclosed for side-channel attack mitigation for secure devices including cryptographic circuits using block ciphers that are not based upon feedback. For disclosed embodiments, an integrated circuit includes a cryptographic circuit and a controller. The cryptographic circuit performs cryptographic operations in a block cipher AES mode without feedback. The controller outputs control signals to the cryptographic circuit that cause the cryptographic circuit to perform the cryptographic operations on sequential data blocks with an internally permuted order to mitigate block cipher side-channel attacks. The internally permuted order can be generated using one or more random number generators, one or more pre-configured permutated orders, or other techniques. Further, sequential data blocks can be grouped into sequential subsets of data blocks, and the cryptographic operations can be performed in sequence for the subsets with data blocks within each subset being processed with an internally permuted order.

Block cipher side-channel attack mitigation for secure devices

Embodiments include cryptographic circuits having isolated operation with respect to embedded sensor operations to mitigate side-channel attacks. A cryptographic circuit, a sensor, and an analog-to-digital converter (ADC) circuit are integrated into an integrated circuit along with a cryptographic circuit. A sensed signal is output with the sensor, and the sensed signal is converted to digital data using the ADC circuit. Further, cryptographic data is generated using one or more secret keys and the cryptographic circuit. The generation of the cryptographic data has isolated operation with respect to the operation of the sensor and the ADC circuit. The isolated operation mitigates side-channel attacks. The isolated operation can be achieved using power supply, clock, and/or reset circuits for the cryptographic circuit that are electrically isolated from similar circuits for the sensor and ADC circuit. The isolated operation can also be achieved using time-division multiplex operations. Other variations can also be implemented.

Side-channel attack mitigation for secure devices with embedded sensors

An integrated circuit includes a tamper sensor that has plurality of state circuits. Each of the plurality of state circuits has a respective output that provides a respective logic state. When operating properly, the respective logic state is toggled in response to a clock signal. The respective logic state fails to toggle in response to a respective fault injection. The tamper sensor has an output that provides a fault signal in response to a difference in the respective logic state of the plurality of state circuits. Additionally, the integrated circuit includes a protected circuit, as well as a tamper response circuit. The tamper response circuit is connected to the tamper sensor and to the protected circuit. The tamper response circuit executes a protection operation to secure the protected circuit in response to the fault signal.

Integrated circuit with tamper protection and method therefor

An integrated circuit includes an energy detection circuit, a switching circuit, and a tamper response circuit. The integrated circuit has an input for receiving a radio frequency (RF) signal, a first output for providing a demodulated signal, and a second output for selectively providing a detect signal. The detect signal is provided in response to detecting that an energy of an internal signal exceeds a first threshold when the integrated circuit is in a secure mode. The switching circuit is used to alternatively switch the input of the energy detection circuit to an RF input terminal in a normal mode and to an internal antenna in a secure mode. The tamper response circuit disables a function of the integrated circuit in response to an activation of the detect signal in the secure mode.

Integrated receiver circuit for electromagnetic pulse detection in wireless microcontrollers

In one example, an apparatus includes: a delay unit to delay a demodulated signal obtained from an input radio frequency (RF) frequency modulation (FM) signal; a filter to filter the demodulated signal and output a filtered demodulated signal; an impulse detection circuit to receive the filtered demodulated signal and detect presence of an impulse in the demodulated signal; and an impulse removal circuit to remove the detected impulse from the demodulated signal.

Removing impulsive noise in a radio

In an embodiment, an apparatus includes a buffer to store incoming orthogonal frequency division multiplexed (OFDM) samples. This buffer is configured to output the OFDM samples according to a read pointer that can be adjusted by a sum value corresponding to a sum of a length of a symbol and a feedback value, to align the read pointer with the symbol. In addition, the apparatus further includes a feedback circuit coupled to the buffer to receive the output OFDM samples and generate the feedback value based at least in part on the output OFDM samples.

Synchronizing orthogonal frequency division multiplexed (OFDM) symbols in a receiver

Systems and methods are disclosed for rapid detection of digital content within received radio frequency (RF) signals. The disclosed embodiments digitize received RF signals and apply a sliding window average to subsampled complex magnitudes for the digital samples to generate subsampled magnitude values. The subsampled magnitude values are then collected over a small number of symbols for the digital content, and the results are analyzed to determine whether or not digital content is present with the received signals. For example, multi-symbol histograms and magnitude ratios determined over multiple symbols can then be utilized to make the determination of whether digital content is present in the received signals. The resulting detection determination can be utilized further to control operations of systems utilizing the disclosed embodiments. The disclosed embodiments can be used, for example, to detect the presence of HD (High Definition) Radio digital content within broadcast channels.

Methods and systems for rapid detection of digital radio signals

Systems and methods are disclosed that may be implemented to process a received RF spectrum that includes both analog modulated and digitally modulated RF signals to blend between a digital demodulated signal and an analog demodulated signal obtained from the received RF spectrum prior to performing one or more signal quality mitigation operations on the blended signal (e.g., such as stereo blend, hi-cut, etc.). In one embodiment, the digital demodulated signal and the analog demodulated signal may include at least some of the same information, e.g., such as information from simulcast digital and analog channels that are obtained from the same received RF spectrum.

Methods and systems for blending between analog and digital broadcast signals

Systems and methods are disclosed for rapid detection of digital content within received radio frequency (RF) signals. The disclosed embodiments digitize received RF signals and apply a cyclic prefix correlation to generate correlation values that are accumulated over a plurality of symbol times. The accumulated correlation values are then stored in a dump register after these plurality of symbol times, and the accumulated correlation values are used to determine whether or not digital content is present within the broadcast channel being analyzed. The disclosed embodiments are useful, for example, in determining whether DAB (Digital Radio Broadcast) digital content is present within audio broadcast channels by detecting the cyclic prefix within the DAB transmissions.

Methods and systems for rapid detection of digital content within RF signals

In one embodiment, a receiver front end circuit can receive and process multiple radio frequency (RF) signals and output downconverted signals corresponding to these signals. In turn, multiple signal processors can be coupled to this front end. Specifically, a first signal processor can receive and process the downconverted signals to output a first signal obtained from content of a first RF signal, and a second signal processor can receive and process the downconverted signals to output a second signal obtained from content of a second RF signal. In addition, the apparatus may include a detection circuit coupled to the receiver front end circuit to detect presence of at least the second signal and enable the second signal processor responsive to the detected presence.

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Austin, TX, United States of America

Javier Elenes