Protocol-genetic eavesdropping network device

    公开(公告)号:GB2426145B

    公开(公告)日:2009-05-27

    申请号:GB0607386

    申请日:2006-04-12

    Abstract: According to one embodiment, a method comprises capturing, by an eavesdropping device, a packet communicated over a communication network. The eavesdropping device scans the packet's payload, and determines if an identifier is included in the packet's payload that identifies the packet as containing content of interest to the eavesdropping device. Based at least in part on determining that the packet's payload includes such identifier, the eavesdropping device uses the content of interest contained in the packet's payload. In one embodiment, a method comprises forming a packet containing content intended for an eavesdropping device, wherein the packet includes a header portion and a payload portion. The payload portion comprises a) a predefined identifier that identifies the packet as containing the content intended for the eavesdropping device, b) the content intended for the eavesdropping device, and c) an authentication token. The packet is directed via a communication network to a destination.

    13.
    发明专利
    未知

    公开(公告)号:DE602004006573T2

    公开(公告)日:2008-01-31

    申请号:DE602004006573

    申请日:2004-09-23

    Abstract: Creating a low-bandwidth channel in a high-bandwidth channel. By taking advantage of extra bandwidth in a high-bandwidth channel, a low-bandwidth channel is created by inserting extra packets. When an inter-packet gap of the proper duration is detected, the extra packet is inserted and any incoming packets on the high-bandwidth channel are stored in an elastic buffer. Observing inter-packet gaps, minimal latency is introduced in the high-bandwidth channel when there is no extra packet in the process of being sent, and the effects of sending a packet on the low-bandwidth channel are absorbed and distributed among other passing traffic.

    15.
    发明专利
    未知

    公开(公告)号:DE102006012466A1

    公开(公告)日:2006-11-16

    申请号:DE102006012466

    申请日:2006-03-17

    Abstract: By equipping receiving devices in a network with synchronizable clocks it is possible to periodically send an "impulse" signal that is received by all of the clocks at the same (or relatively the same) instant of time. The accuracy of the impulse clock need not be high, only that its signal reach all the clocks approximately at the same time. In one embodiment, a transmitting device, upon receipt of the synchronizing impulse signal, sends a packet of data bearing the sending device's epoch time-stamp to a receiving device. The data packet makes its way through the network element to the receiving device and the time-stamp is used by the receiving device to calculate the difference between the epoch time of the receiver and the epoch time of the sender. Effectively, this procedure removes the unknown network element transit times from the equation and allows the devices to operate in a synchronized manner.

    Network time synchronisation using a determination of network element transit times

    公开(公告)号:GB2426164A

    公开(公告)日:2006-11-15

    申请号:GB0607387

    申请日:2006-04-12

    Abstract: By equipping receiving devices in a network with syncbronizable clocks it is possible to periodically send an "impulse" signal that is received by all of the clocks at the same (or relatively the same) instant of time. The accuracy of the impulse clock need not be high, only that its signal reach all the clocks approximately at the same time. In one embodiment, a transmitting device, upon receipt of the synchronizing impulse signal, sends a packet of data bearing the sending device's epoch time-stamp to a receiving device. The data packet makes its way through the network element to the receiving device and the time-stamp is used by the receiving device to calculate the difference between the epoch time of the receiver and the epoch time of the sender. Effectively, this procedure removes the unknown network element transit times from the equation and allows the devices to operate in a synchronized manner.

    Kommunikationssystem, Vorrichtung zum Erzeugen eines Teilkanals und Verfahren hierfür

    公开(公告)号:DE102007019549B4

    公开(公告)日:2011-10-13

    申请号:DE102007019549

    申请日:2007-04-25

    Abstract: Vorrichtung zum Erzeugen eines Teilkanals in einem Hauptkanal zwischen einem ersten Netzwerkknoten und einem zweiten Netzwerkknoten, wobei die Vorrichtung folgende Merkmale aufweist: einen Datenspeicher zum vorübergehenden Speichern von Teilkanaldaten; eine Verarbeitungsressource zum Überwachen einer Kommunikation von dem ersten zu dem zweiten Netzwerkknoten, wobei die Verarbeitungsressource dahin gehend angeordnet ist, wenn sie im Gebrauch ist, Daten zum Bezeichnen eines Ruhezeitraums und eine geeignete Kanalbedingung, welche vorliegt, wenn die Daten zum Bezeichnen des Ruhezeitraums zumindest einer vorbestimmten geeigneten Mindestdauer entsprechen, um die Einleitung einer Übertragung der Teilkanaldaten anstelle des zumindest Teils der Daten zum Bezeichnen des Ruhezeitraums zu ermöglichen, in der Kommunikation zu identifizieren sowie zu bestimmen, ob nicht ausreichend Zeit vorliegt, um ein probabilistisches Eintreten eines anschließenden Ruhezeitraums abzuwarten, bevor eine zeitliche Frist, die Teilkanaldaten zu übertragen, erreicht ist; wobei die Verarbeitungsressource ferner dahin gehend angeordnet ist, wenn sie im Gebrauch ist, eine Strömungssteuerungsnachricht, welcher eine zeitliche Begrenzung...

    20.
    发明专利
    未知

    公开(公告)号:DE102006011699B4

    公开(公告)日:2007-08-02

    申请号:DE102006011699

    申请日:2006-03-14

    Abstract: Arbitrary numerical distributions are presented for use in devices having limited processing and storage capabilities by having the device accept strings of arbitrarily distributed numbers from a source outside of the device. In one embodiment, a master controller creates a table of values which follow the desired minimum, maximum, mean, and standard deviation, etc. of the particular desired statistical distribution required. The created table is then communicated to the limited capacity device and can be used whenever a distribution of random values is required. The master controller could have one of several slave devices associated with it in the system. In another embodiment, where the storage capability of the device is large enough to store a table of values with sufficient different entries to create a distribution of satisfactory "randomness" for the particular application, a random number generator within the device is used to select the order of presentation of the table of values.

Patent Agency Ranking