Technische Universität München Patente

The invention relates to a computer implemented method for authentication of a prover device (P) containing a Physically Unclonable Function (PUF). The method comprises the steps: a) determining (51) enrollment data of a model (M) containing reliability information for individual PUF responses by reading out a specific response of the PUF of the prover device (P), e.g. by repeatedly measuring a specific PUF response under different operation conditions, until a predetermined accuracy of the reliability information is reached, and storing the enrollment data and the model (M) containing reliability information for individual PUF responses of the prover device (P) known to a verifier device (V) in a database unit (DB) of the verifier device (V), b) the verifier device (V) generates a number (N1) that can be used just once and sends (S3) it to the prover device (P), c) the prover device (P) applies (S4) a Cryptographic Hash Function (HF) to a conjunction (C) of a fuzzy secret output (SO) of the PUF and at least the number (N1) that can be used just once and sends (55) at least a part of an output (HFO) of the Cryptographic Hash Function (HF) to the verifier device (V), and d) the verifier device (V) determines (S7) a symbol-specific likelihood from the model (M) containing reliability information for individual PUF responses to derive a number of hypotheses (H1, H2, H3) for the secret output, wherein the hypotheses (H1, H2, H3) have different likelihoods and the number depends on a noise level of the PUF, a predetermined false rejection rate and/or a length of the secret output (SO), and the verifier device (V) applies the Cryptographic Hash Function (HF) to the conjunction (C) of every hypothesis (H1; H2; H3) for the secret output of the number of hypotheses (H1, H2, H3) and at least the number (N1) that can be used just once until at least a part of an output of the Cryptographic Hash Function (HF) of the verifier device (V) matches (S9) at least the part of the output (HFO) of the Cryptographic Hash Function (HF) received from the prover device (P) for a successful authentication. Other aspects of the invention are a computer program product which causes the computer to execute the method and a system for authentication of a prover device (P) containing a Physically Unclonable Function (PUF).

A photoacoustic gas sensor (100) comprises an emitter (110) configured to emit light, a sensor (120) configured to measure pressure variations and a measurement cell (130) enclosing the emitter and the sensor. At least a first ventilation opening (140a) and a second ventilation opening (140b) connect the measurement cell (130) with an environment (150).

Provided is a first network node communicating in a sequence of network nodes in a network. The first network node comprises circuitry configured to generate a first cryptographic context with a second network node in the sequence. The circuitry is further configured to generate a second cryptographic context with a third network node in the sequence. With respect to the first network node, a directly neighboring network node has access to at most one of the first and the second cryptographic contexts.

Provided is a first network node for communicating with a second network node. The first network node includes circuitry configured to locally generate a first encryption key. The circuitry is further configured to communicate the first encryption key to the second network node via a first communication path. The circuitry is further configured to receive a second encryption key from the second network node via a second communication path. The second communication path involves at least one third network node different from a fourth network node of the first communication path. The circuitry is further configured to communicate encrypted payload data with the second network node. The encryption is based on a combination of the first and second encryption keys.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Disclosed herein is a method of determining information regarding the location of energy deposition of an ion beam (14) in an absorptive medium, comprising the following steps: generating a pulsed ion beam (16), detecting a time-resolved acoustic signal, said time-resolved acoustic signal comprising an energy-deposition-signal component attributable to the energy deposition of an individual pulse of said pulsed ion beam in said absorptive medium, determining relative timing information of the energy deposition of said individual pulse with respect to said time-resolved acoustic signal, providing a matched filter for processing the time-resolved acoustic signal, and applying said matched filter to said time-resolved acoustic signal, deriving, from the filtered time-resolved signal, occurrence timing information related to the occurrence of said energy-deposition signal component in said time-resolved acoustic signal, and deriving information regarding the location of the energy deposition based, at least in part, on a delay between said energy deposition of said individual pulse and said occurrence timing information.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Die vorliegende Offenbarung betrifft Verfahren, Vorrichtungen und Computerprogramme für einen Sender und einen Empfänger und zur Sicherung einer Richtfunkverbindung, einen Sender, einen Empfänger, eine Relaisstation und ein Richtfunksystem. Das Verfahren (10) für einen Sender (300) und zur Sicherung einer Richtfunkverbindung zwischen dem Sender (300) und einem Empfänger (400) in einem Richtfunksystem (500) umfasst ein Ausrichten (11) eines Richtfunkantennenstrahls, sodass der Empfänger (400) in einer Hauptabstrahlrichtung des Antennenstrahls liegt und ein Einfügen (12), auf der physikalischen Schicht, von zusätzlichen Rauschanteilen in eine Nachricht für den Empfänger (400), um eine geschützte Nachricht für den Empfänger (400) zu erhalten. Das Verfahren umfasst darüber hinaus ein Senden (13) der geschützten Nachricht an den Empfänger (400) über den Antennenstrahl.

An artificial joint for a prosthesis or robot arm, the artificial joint comprising a first rigid link, a second rigid link, a compliant joint rotatably connecting the first rigid link and the second rigid link with respect to a principal plane of rotation, and comprising an elastic link extending between the first rigid link and the second rigid link, and a first string section and a second string section both extending between the first rigid link and the second rigid link, being arranged on opposite sides with respect to the compliant joint, such that shortening one of the first string section and of the second string section and lengthening the other one of the first string section and of the second string section drives a rotation of the first rigid link and the second rigid link with respect to each other in the principal plane of rotation.

Zusammenfassung wird geladen …

There is provided an apparatus for measurement collection for training a machine learning algorithm for predictive handover, the apparatus comprising means for: receiving a configuration message from a network, the configuration message comprising at least information on logging radio signal measurements data that is correlated to handover events and a reporting condition for reporting at least part of the radio signal measurements to be logged by the apparatus; in response to fulfilling a starting condition, starting logging of measurements at least partly based on the configuration message, wherein the starting condition is stored in the apparatus and/or comprised in the configuration message; in response to fulfilling a stopping condition, checking whether the reporting condition is fulfilled, wherein the stopping condition is stored in the apparatus and/or comprised in the configuration message; discarding the logged measurements if the reporting condition is not fulfilled; or reporting to the network at least part of the logged measurements if the reporting condition is fulfilled.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

The present invention relates to an improved methanation process, wherein energy released during the methanation process is used to drive a turbocharger to drive and/or maintain the process. The present invention is further concerned with a system for the production of methane-enriched gas and power from hydrogen and carbon-containing starting materials comprising at least one methanation reactor and at least one turbocharger.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur Synthese von Ammoniak (8), bei dem ein Wasserstoff und Stickstoff umfassendes Gasgemisch (1) mit zeitlich schwankendem Mengenstrom zur Bildung eines Ammoniaksynthesegases (3) bereitgestellt wird, das nach einem Verdichtungsschritt (V2) in einem Ammoniakreaktor (R) zu einem ammoniakhaltigen Syntheseprodukt (5) umgesetzt wird, von dem ein Wasserstoff und Stickstoff umfassendes Recyclegas (2) abgetrennt wird, um über eine Rückführleitung zur Bildung des Ammoniaksynthesegases (3) zurückgeführt zu werden. Kennzeichnend hierbei ist, dass der Mengenstrom des Recyclegases (2) über eine verstellbare, in der Rückführleitung (2) angeordnete Drosseleinrichtung (b) so kontrolliert wird, dass der Druck im Ammoniakreaktor (R) stets innerhalb eines vorgegebenen Wertebereichs liegt.