On the way to 'duende' (through Lorca's 'Elogio de Antonia Merce, 'la Argentina', 1930)

This article analyzes how Lorca develops the concept of ‘duende’, finding a crucial missing link in the Elogio de Antonia Mercé, ‘la Argentina’ (1930). ‘Duende’ crystallizes around 1929/1930 when the poet explicitly takes into account the art of the dancer in performance. Three aspects of performance are singled out and systematically traced through Lorca's evolving reflections on popular art and the struggle of the modern artist to create the new – from his first lecture on the cante jondo in 1922 to the Arquitectura del cante jondo (1930) and finally Juego y teoría del duende (1933). The conclusion is drawn that it is in the performance and reception of a text – whether it is heard or read – that the artist's agonistic stand between tradition and modernity, repetition and singularity, is played out, in an invitation to the listener or reader to celebrate his or her mortality.

Improving RO PUF design using frequency distribution characteristics

A Physical Unclonable Function (PUF) can be used to provide authentication of devices by producing die-unique responses. In PUFs based on ring oscillators (ROs) the responses are derived from the oscillation frequencies of the ROs. However, RO PUFs can be vulnerable to attack due to the frequency distribution characteristics of the RO arrays. In this letter, in order to improve the design of RO PUFs for FPGA devices, the frequencies of RO arrays implemented on a large number of FPGA chips are statistically analyzed. Three RO frequency distribution (ROFD) characteristics, which can be used to improve the design of RO PUFs are observed and discussed.

RO PUF Design in FPGAs with new comparison strategies

A Physical Unclonable Function (PUF) can be used to provide authentication of devices by producing die-unique responses. In PUFs based on ring oscillators (ROs), the responses are derived from the oscillation frequencies of the ROs. However, RO PUFs can be vulnerable to attack due to the frequency distribution characteristics of the RO arrays. In this paper, in order to improve the design of RO PUFs for FPGA devices, the frequencies of RO arrays implemented on a large number of FPGA chips are statistically analyzed. Three RO frequency distribution (ROFD) characteristics are observed and discussed. Based on these ROFD characteristics, two RO comparison strategies are proposed that can be used to improve the design of RO PUFs. It is found that the symmetrical RO comparison strategy has the highest entropy density.