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Assignee: BBN Technologies Corp.


Location: Cambridge, MA
No. of patents: 108

1      
NumberTitleIssue Date
7773540Methods, system and apparatus preventing network and device identification
A system processes data communications traffic by detecting data communications traffic arriving at a network device for an intended recipient device and determining if the data communications traffic is at least one of initial data communications traffic for a new ...
08/10/2010
7706535Systems and methods for implementing routing protocols and algorithms for quantum cryptographic key transport
A quantum cryptographic key distribution (QKD) relay (205) includes one or more interfaces (530-1 through 530-N) and processing logic (505). The one or more interfaces (530-1 through 530-N) receive secret keys ...
04/27/2010
7697693Quantum cryptography with multi-party randomness
A method and system for performing a quantum key distribution process in a quantum cryptographic system (200, 400) is provided. A first endpoint (405a) contributes a first set of random values to a quantum key distribution process. A second endp...
04/13/2010
7668083Systems and methods for forwarding data in a communications network
A communications network (100) includes at least one control station (160) and a group of network nodes (110, 120, 140). The at least one control station (160) generates batches of forwarding tables (300), where each batch of forwa...
02/23/2010
7629986Motion-based visualization
A data-display system employs a display in which the representations of data objects are caused to move on the display in order to convey information about the represented data objects. In one example, icons in a link-analysis display that represent data objects sat...
12/08/2009
7627126Systems and methods for implementing path length control for quantum cryptographic systems
A quantum cryptographic key distribution (QKD) endpoint (405) includes a QKD receiver and a feedback system (1600). The QKD receiver receives symbols transmitted over a QKD path. The feedback system (1600) controls a length of the QKD path based...
12/01/2009
7574597Encoding of signals to facilitate traffic analysis
A system acquires information about communication among wired or wireless nodes [110, 210] in a network [100, 200] by intercepting chunks of data in the network by a wired or wireless tap [120, 220] located among the wired or wireless nodes [...
08/11/2009
7573889Systems and methods for efficient buffering and metering of high-speed flows
Systems and methods are disclosed in which one or more cells are buffered in a communication system. In one embodiment, the method includes receiving a cell; classifying the cell as one of a set of flows; transmitting the cell to one of a set of queues of static mem...
08/11/2009
7542437Systems and methods for conserving energy in a communications network
A communications network (100) includes a first node (110) and a group of neighboring nodes (110). The first node (110) includes at least one transceiver (340). The first node (110) may observe one or more conditions in at l...
06/02/2009
7540029Methods and systems for reducing the spread of files on a network
Methods and systems can reduce the spread of computer files or data on a network by obtaining and tracking times of arrival for chunks of data transmitted on the network. The times of arrival for a node can be transformed into time-series and periodograms computed f...
05/26/2009
7532623Methods for wireless mesh multicasting
The invention relates generally to systems, methods and/or devices for joining, generating, maintaining, and/or multicasting information via a multicast mesh. ...
05/12/2009
7522628Systems and methods for implementing coordinated optical channel access
A system for optical channel access in a network (105) includes multiple distributed nodes (205) that further include a first node (420), a second node (410) and a third node (415). The first node (420) of the multiple distr...
04/21/2009
7515716Systems and methods for reserving cryptographic key material
Systems and a methods are provided for reserving a rate at which cryptographic material is provided. A reservation request [700] for reserving the rate is sent from a secret bits consuming application [410] to a secret bit producing application [405...
04/07/2009
7512780Packet-parallel high performance cryptography systems and methods
A cryptographic system (500) includes cryptographic sub-units (510) and associated input buffers (520) connected to a scheduler (530) and a reassembler (540). The scheduler (530) receives packets, where each of the packets i...
03/31/2009
7512242Systems and methods for quantum cryptographic key transport
A system transports a key between a first node (505) at one end of a path (500) through a quantum cryptographic key distribution (QKD) network to a second node (525) at an opposite end of the path (500), where the QKD network includes mul...
03/31/2009
7500266Systems and methods for detecting network intrusions
A device (120) processes traffic in a network. The device (120) obtains information corresponding to an activity between a group of source devices and one or more services of destination devices, measures, for each of the group of source devices, a beh...
03/03/2009
7483392Multinode arrangement
The present invention provides a multinode arrangement that utilizes a plurality of nodes that communicate with each other by RF transmissions and hardwire communications. The use of both hardwire and RF transmission provides the advantages obtained with both forms ...
01/27/2009
7478043Estimation of speech spectral parameters in the presence of noise
A speech analysis system includes a codebook (230) that stores speech spectral parameters corresponding to a speech spectral hypothesis. The speech spectral hypothesis may be combined with a noise spectral hypothesis and the combined hypothesis compared to a ...
01/13/2009
7460670Systems and methods for managing quantum cryptographic networks
A system (125) performs network management in a quantum cryptographic network (115). The system (125) monitors parameters associated with multiple links and multiple nodes of the quantum cryptographic network (115). The system (125...
12/02/2008
7457859Connectivity service-level guarantee monitoring and claim validation systems and methods
A system monitors performance in a network that includes several network resources. The system obtains a list of targets in the network. The targets include selected ones of the resources. The system sends a request to the targets, receives responses from the target...
11/25/2008
7457416Key distribution center for quantum cryptographic key distribution networks
Methods and systems are provided for distributing key information by securely transmitting light information in a network along a path comprised of a plurality of network devices and by using a key distribution center (KDC) connected with the network. Three or more ...
11/25/2008
7447636System and methods for using transcripts to train an automated directory assistance service
An automated directory assistance (130) includes a training system (210). and a directory assistance system (220). The training system (210) trains and maintains the directory assistance system (220). The training system (210
11/04/2008
7441267Method and apparatus for controlling the flow of data across a network interface
The present invention performs “flow control” based on the remaining encryption capacity of an encrypted outbound network interface link of a network routing device, such as a router or switch. As the encrypted link begins to run low on encryption key material, ...
10/21/2008
7440853Systems and methods for detecting shallow buried objects
The invention relates to a seismic system having an array of nodes, each capable of emitting and detecting seismic signals. The array of nodes is mounted on a mobile platform in a certain geometry and is configured to acquire subsurface data, and more particularly d...
10/21/2008
7430295Simple untrusted network for quantum cryptography
A method and system for distributing quantum cryptographic keys among a group of user devices through a switch connected to the user devices are provided. A switch [1000] establishes a connection between two user devices [405a, 405b
09/30/2008
7424427Systems and methods for classifying audio into broad phoneme classes
An audio classification system classifies sounds in an audio stream as belonging to one of a relatively small number of classes. The audio classification system includes a signal analysis component [301] and a decoder [302]. The decoder [302] in...
09/09/2008
7424225Systems and methods for implementing contention-based optical channel access
A first node (205) in a network includes a non-optical transceiver (415) and an optical subsystem (410). The non-optical transceiver (415) sends a request message to establish an optical link from the first node (205) to a second n...
09/09/2008
7421936Systems and methods for explosive blast wave mitigation
The invention in various embodiments is directed to systems and methods for mitigating damage from a shock wave using a gas having a specific impedance less than air. ...
09/09/2008
7423995Criteria for tearing down network links
The present invention, which may be embodied in or carried out by various components of a data communications network, provides an improved criterion for tearing down network links. The invention allows network components to take into account the quality, status and...
09/09/2008
7415012Systems and methods for high speed packet classification
Systems and methods are disclosed for classifying packets with a rule. In one exemplary embodiment, the method includes receiving a packet; determining a key value for the received packet; identifying a rule corresponding to the determined key value by searching a s...
08/19/2008
7408840System and method for disambiguating shooter locations
Systems and methods for determining and disambiguating the location of the shooter of supersonic projectiles based on shockwave-only signals are described. Using several spaced sensors, an initial portion of the shockwave-only signals is sensed to determine Time-Dif...
08/05/2008
7401023Systems and methods for providing automated directory assistance using transcripts
An automated directory assistance (130) includes a training system (210) and a directory assistance system (220). The training system (210) trains and maintains the directory assistance system (220). The training system (210...
07/15/2008
7392378Method and apparatus for routing data traffic in a cryptographically-protected network
The present invention is useful for routing data traffic in data communications networks where some or all of the network interface links are protected by cryptographic techniques, e.g., encryption. The invention routes datagram traffic in such networks toward inter...
06/24/2008
7389233Self-organizing speech recognition for information extraction
A system is provided that trains a speech processing device to recognize any spoken language. The speech processing device is trained by receiving a group of speech frames (302). The group of speech frames is grouped into a group of segments (304). A m...
06/17/2008
7389229Unified clustering tree
A unified clustering tree (500) generates phoneme clusters based on an input sequence of phonemes. The number of possible clusters is significantly less than the number of possible combinations of input phonemes. Nodes (510, 511) in the unified cluster...
06/17/2008
7386003Systems and methods for communicating in a personal area network
A network (100) connects a hub device (110) to several peripheral devices (120). The hub device (110) generates a token and broadcasts the token on the network (100). Each of the peripheral devices (120) receives the token b...
06/10/2008
7383580Computer virus detection and prevention
A system (140) prevents the spread of viruses in a network (100). The system (140) receives a hash value from a remote device (130), compares the hash value to a group of hash values associated with data messages including viruses, and ge...
06/03/2008
7372772Systems and method for compensation of sensor degradation in shooter detection systems
Systems and methods for compensation of sensor degradation in multi-shooter detection systems are described. In such systems, shooter position and trajectory can be estimated precisely from the shockwaves produced at the plurality of sensors by the incoming shots. H...
05/13/2008
7369512Systems and methods for efficient packet distribution in an ad hoc network
A system provides packet flooding in a network (200) that includes multiple nodes (210). The system may receive a flood packet, select one or more of the nodes (210) as a like number of one or more relays (210), and attach a header to the...
05/06/2008
7366125Extensible satellite communication system
A satellite network [100] includes backbone satellites [110]. The backbone satellites [110] act as routers for data units transmitted through network [100]. The backbone satellites [110] communicate with one another through inter-s...
04/29/2008
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