Abstract:
Methods and apparatus are provided for attesting the configuration of a computing platform (1) to a verifier (3). A signature key (SK) is bound to the platform (1) and bound to a defined configuration of the platform (1). A credential (C(SK), CDAA(SK)) for the signature key (SK) is obtained from an evaluator (2). This credential (C(SK), CDAA(SK)) certifies that the signature key (SK) is bound to an unspecified trusted platform configuration. The platform (1) can then demonstrate to the verifier (3) the ability to sign a challenge from the verifier (3) using the signature key (SK), and demonstrate possession of the credential (C(SK), CDAA(SK)) to the verifier (3), thereby attesting that the platform (1) has a trusted configuration without disclosing the platform configuration to the verifier (3). The ability to sign the challenge may be demonstrated by returning the signed challenge to the verifier (3), and possession of the credential may similarly be demonstrated by sending the credential C(SK) to the verifier (3). Alternatively, the credential may be an anonymous credential CDAA(SK) bound to a public key of the signature key (SK). In this case, possession of the credential CDAA(SK), and the ability to sign the challenge, can be demonstrated without actually disclosing the credential or the public key of the signature key (SK) to the verifier (3). Corresponding methods and apparatus relating to operation of an evaluator (2) and verifier (3) in the attestation process are also provided.
Abstract:
Für eine besonders einfache und sichere Erkennung der Funktionsfähigkeit einer Batterie, insbesondere einer Fahrzeugbatterie werden erfindungsgemäss bei einem Verfahren zur Bestimmung der Startfähigkeit eines Fahrzeugs Stromwerte und Spannungswerte der Batterie während eines vorgegebenen Zeitfensters, insbesondere während des Startens des Fahrzeugs, erfasst, wobei anhand der Stromwerte und der Spannungswerte mittels linearer Regression ein Innenwiderstand der Batterie bestimmt und anhand von einem innerhalb des vorgegebenen Zeitfensters erfassten Maximalwert für den Strom und Minimalwert für die Spannung ein Referenz-Widerstandswert für das Startverhalten des Fahrzeugs ermittelt wird, wobei anhand eines Vergleichs des Innenwiderstands mit dem Referenz-Widerstandswert ein die Startfähigkeit repräsentierender Wert bestimmt wird.
Abstract:
A data stream recorder system (11) for mufti-stream recording and retrieval utilizes a number of gateways (23, 24, 25), each for sending and receiving packets containing streaming multimedia content data at real-time rates via a packet data network. A session manager communicates via the network with source client devices and receiver client devices to establish and control recording and retrieval sessions. The manager assigns sessions to the gateways for the sending and receiving of the packets to and from client devices. Content is distributed across storage devices associated in storage nodes (27, 28, 29). Each of the gateways (23, 24, 25) receives packets containing content data at real time rates during a recording session and distributes the received packets from the session across all of the storage nodes (27, 28, 29). A scheduler of each respective storage node distributes content data from packets distributed to the respective storage node, across all of the digital storage devices of the respective storage node.
Abstract:
Methods and apparatus are provided for attesting the configuration of a computing platform (1) to a verifier (3). A signature key (SK) is bound to the platform (1) and bound to a defined configuration of the platform (1). A credential (C(SK), CDAA(SK)) for the signature key (SK) is obtained from an evaluator (2). This credential (C(SK), CDAA(SK)) certifies that the signature key (SK) is bound to an unspecified trusted platform configuration. The platform (1) can then demonstrate to the verifier (3) the ability to sign a challenge from the verifier (3) using the signature key (SK), and demonstrate possession of the credential (C(SK), CDAA(SK)) to the verifier (3), thereby attesting that the platform (1) has a trusted configuration without disclosing the platform configuration to the verifier (3). The ability to sign the challenge may be demonstrated by returning the signed challenge to the verifier (3), and possession of the credential may similarly be demonstrated by sending the credential C(SK) to the verifier (3). Alternatively, the credential may be an anonymous credential CDAA(SK) bound to a public key of the signature key (SK). In this case, possession of the credential CDAA(SK), and the ability to sign the challenge, can be demonstrated without actually disclosing the credential or the public key of the signature key (SK) to the verifier (3). Corresponding methods and apparatus relating to operation of an evaluator (2) and verifier (3) in the attestation process are also provided.
Abstract:
Bei der vorliegenden Einrichtung zur Energieversorgung für ein elektrisch unterstütztes Bremssystem (22) mit einem Bordnetz (10), umfassend einen Bordnetzgenerator (12), eine Batterie (14) und Verbraucher (16), ist mindestens ein radseitig unmittelbar an den Antriebsstrang (30) gekoppelter Zusatzgenerator (24) zur Umwandlung eines Anteils der kinetischen Energie des Fahrzeugs in elektrische Energie zur Energieversorgung des elektrisch unterstützten Bremssystems (22) vorgesehen. Durch diese Maßnahme wird mit nur geringem Aufwand eine im wesentlichen vom Bordnetz unabhängige Energieversorgung des elektrisch unterstützten Bremssystems (22) erreicht.
Abstract:
The object of the invention is to provide an especially simple and safe method for recognizing the operativeness of a battery, especially of a vehicle battery. To this end, the invention provides a method for determining the starting capability of a vehicle which is characterized in that current values and voltage values of the battery are detected during a predetermined time window, especially while the vehicle is started. The current values and voltage values are used to determine an internal resistance of the battery by means of linear regression. Based on the maximum value for the current and the minimum value for the voltage determined during said predetermined time window a reference resistance value is determined for the starting capability of the vehicle and a value representing the starting capability is determined on the basis of a comparison of the internal resistance with the reference resistance.
Abstract:
A peer to peer audio communication screen in system with adaptive bandwidth control. The peer-to-peer system can be used, for example, in classroom applications. More interactive peers are "moved to a position where they will receive lower latency from the peer-to-peer system. This may be done by maintaining a score indicative of the amount of interactivity, and then using that score to move a peer either closer to the source of audio packets, e.g., the core or further from that source.
Abstract:
A data stream recorder system (11) for mufti-stream recording and retrieval utilizes a number of gateways (23, 24, 25), each for sending and receiving packets containing streaming multimedia content data at real-time rates via a packet data network. A session manager communicates via the network with source client devices and receiver client devices to establish and control recording and retrieval sessions. The manager assigns sessions to the gateways for the sending and receiving of the packets to and from client devices. Content is distributed across storage devices associated in storage nodes (27, 28, 29). Each of the gateways (23, 24, 25) receives packets containing content data at real time rates during a recording session and distributes the received packets from the session across all of the storage nodes (27, 28, 29). A scheduler of each respective storage node distributes content data from packets distributed to the respective storage node, across all of the digital storage devices of the respective storage node.
Abstract:
Für eine möglichst einfache und sichere Erkennung der Funktionsfähigkeit einer Batterie ist erfindungsgemäß ein Verfahren zur Bestimmung der Leistungsfähigkeit der Batterie zur Bereitstellung einer Bordnetzspannung für ein Bordnetz, insbesondere eines Fahrzeugs, vorgesehen, bei dem die Bordnetzspannung (U) erfaßf wird, wobei innerhalb eines vorgebbaren Zeitfensters (Z) für einen vorgebbaren Betriebsmodus Bordnetzspannung (U) und Bordnetzstrom (I) derart überwacht werden, daß die Bordnetzspannung (U) am Ende des Zeitfensters (Z) in Abhängigkeit von dem während des Betriebsmodus abgegebenen Bordnetzstrom (I) einen vorgebbaren Grenzwert (G) überschreitet.
Abstract:
Embodiments of methods for multimedia annotation with sensor data (referred to herein as Sensor-rich video) includes acquisition, management, storage, indexing, transmission, search, and display of video, images, or sound, that has been recorded in conjunction with additional sensor information (such as, but not limited to, global positioning system information (latitude, longitude, altitude), compass directions, WiFi fingerprints, ambient lighting conditions, etc.). The collection of sensor information is acquired on a continuous basis during recording. For example, the GPS information may be continuously acquired from a corresponding sensor at every second during the recording of a video. Therefore, the acquisition apparatus generates a continuous stream of video frames and a continuous stream of sensor meta-data values. The two streams are correlated in that every video frame is associated with a set of sensor values. Note that the sampling frequency (i.e., the frequency at which sensor values can be measured) is dependent on the type of sensor. For example, a GPS sensor may be sampled at 1-second intervals while a compass sensor may be sampled at 50 millisecond intervals. Video is also sampled at a specific rate, such as 25 or 30 frames per second. Sensor data are associated with each frame. If sensor data has not changed from the previous frame (due to a low sampling rate) then the previously measured data values are used. The resulting combination of a video and a sensor stream is called a sensor-rich video.