Random binary sequence generator

Details Random binary sequence generator Random binary sequence generator

G - Physics

06

F

G06F 7/58 (2006.01)

Patent

CA 2546224

The invention relates to the generation of random binary or number sequences. According to the invention, the sequence is produced from a fingerprint sensor (10) and an analog-to-digital converter (14). The random binary sequence is produced from lower bits from the converter (which has a sufficiently fine resolution for the noise level of the signal from the sensor to randomly toggle the lower bit). Said sensor comprises a matrix of preferably pyroelectric detectors. The order of the bits is mixed up by a reorganization circuit, and means (18) are provided for balancing the distribution of 0 and 1 in the sequence produced.

L~invention concerne la génération de séquences binaires ou nombres aléatoires. On prévoit que la séquence est produite à partir d~un capteur d~empreinte digitale (10) et d~un convertisseur analogique-numerique (14). La séquence binaire aléatoire est produite à partir des bits de poids faible issus du convertisseur (lequel a une résolution suffisamment fine pour que le niveau de bruit du signal issu du capteur fasse basculer aléatoirement le bit de poids faible. Le capteur comporte une matrice de détecteurs pyroélectriques. L~ordre des bits est brouillé par un circuit de réorganisation et des moyens (18) son prévus pour équilibrer la distribution des 0 et des 1 dans la séquence produite.

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