Papers by Angel perez corbacho
IEEE Internet of Things Journal, Apr 1, 2023
Physically Unclonable Functions (PUFs) and True Random Number Generators (TRNGs) are cryptographi... more Physically Unclonable Functions (PUFs) and True Random Number Generators (TRNGs) are cryptographic primitives very well suited for secure IoT devices. This paper proposes a circuit, named multibit-RO-PUF-TRNG, which offers the advantages of unifying PUF and TRNG in the same design. It is based on counting the oscillations of pairs of ring oscillators (ROs), one of them acting as reference. Once the counter of the reference oscillator reaches a fixed value, the count value of the other RO is employed to provide the TRNG and the multibit PUF response. A mathematical model is presented that supports not only the circuit foundations but also a novel and simple calibration procedure that allows optimizing the selection of the design parameters. Experimental results are illustrated with large datasets from two families of FPGAs with different process nodes (90 nm and 28 nm). These results confirm that the proposed calibration provides TRNG and PUF responses with high quality. The raw TRNG bits do not need post-processing and the PUF bits (even 6 bits per RO) show very small aliasing. In the application context of obfuscating and reconstructing secrets generated by the TRNG, the multibit PUF response, together with the proposal of using error-correcting codes and RO selection adapted to each bit, provide savings of at least 79.38% of the ROs compared to using a unibit PUF without RO selection. The proposal has been implemented as an APB peripheral of a VexRiscv RV32I core to illustrate its use in a secure FPGA-based IoT device.
mAGAzin Revista intercultural e interdisciplinar, 1996
Jean Pau/(1763-1825)como llaman familiarmen te a Johann Paul Friedrich Richter forma parte , de /... more Jean Pau/(1763-1825)como llaman familiarmen te a Johann Paul Friedrich Richter forma parte , de /as figuras famosas de la literatura alemana. '-DE U N A N G E l Procedente de familia humilde, ya desde muy joven, tuvo que adaptarse a una rígida disciplina paterna. Tras la temprana muerte de su .) padre, maestro de escuela, la situación econó-TRADuccJóN' mica se hizo aún más apurada. Sin embargo,
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Papers by Angel perez corbacho