Bbn Technologies Corporation

Other

Raytheon Bbn Technologies Corp.

David Bruce Cousins

Craig Partridge

Kurt Rohloff

Tushar Saxena

W Timothy Strayer

William Timothy Strayer

Brian John Palmer

Kevin Paul Bongiovanni

Christopher S Fortin

Frederick John Roeber

Richard E Schantz

Christopher Burbank Lirakis

Kevin Jay Brothers

Scott Davis Stafford

Rajesh Krishnan

Matthew Paul Daily

A method for secure comparison of encrypted symbols. According to one embodiment, a user may encrypt two symbols, share the encrypted symbols with an untrusted third party that can compute algorithms on these symbols without access the original data or encryption keys such that the result of running the algorithm on the encrypted data can be decrypted to a result which is equivalent to the result of running the algorithm on the original unencrypted data. In one embodiment the untrusted third party may perform a sequence of operations on the encrypted symbols to produce an encrypted result which, when decrypted by a trusted party, indicates whether the two symbols are the same.

Method for secure symbol comparison

A method for encoding encrypted data for further processing includes: receiving an input data vector of length m; splitting the input data vector to k multiple vectors; multiplying each of the multiple vectors by a power of 2 to obtain k number of intermediate vectors; summing the k number of intermediate vectors to obtain a single summed vector; encrypting the single summed vector to obtain an encrypted vector; sending the encrypted vector to an operational unit to have the encrypted vector operated on to obtain a processed encrypted vector; receiving the processed encrypted vector; decrypting the received encrypted vector; dividing the processed decrypted vector by a power of 2, modulus a power of 2 to obtain multiple transitional vectors of the same dynamic range and the same length; and concatenating the multiple transitional vectors to obtain a recovered vector of length m.

System and method for encoding encrypted data for further processing

A method for data privacy in a VoIP system includes: generating a private key for an additive homomorphic encryption scheme; sending the private key to a plurality of client terminals to be used by each of the plurality of client terminals to encrypt a respective VoIP streaming data; receiving an encrypted VoIP streaming data from each of the plurality of client terminals, wherein each of the VoIP streaming data is encrypted using the same private key; performing an encrypted homomorphic addition on the encrypted VoIP streaming data to generate a mixed encrypted VoIP data stream; and sending the mixed encrypted VoIP data stream to the plurality of client terminals to be played back.

System and method for mixing VoIP streaming data for encrypted processing

A system acquires information about communication among wired or wireless nodes [] in a network [] by intercepting chunks of data in the network by a wired or wireless tap [] located among the wired or wireless nodes [] in the network. Characteristic information [] about the intercepted chunks of data may be obtained. The characteristic information may include times of arrival [] of the chunks of data at the wired or wireless tap [] and identifiers of wired or wireless source nodes [] that sent the chunks of data. At least one signal may be constructed to represent the characteristic information over time.

Encoding of signals to facilitate traffic analysis

A system processes communication signals in a network [100, 200]. The system may obtain time of arrival information for chunks of data in the network and construct a signal [410, 420] to represent the time of arrival information. The signal may consist of data that is non-uniformly spaced. The system may process the signal using a Lomb technique to obtain periodicity information [600, 800] about the signal.

Methods and systems for passive information discovery using Lomb periodogram processing

A method of determining routing information among nodes [in a network [may include obtaining a set of times of arrival [and corresponding source nodes [for chunks of data in the network [and assigning weights to a set of chunks of data [-based on respective times between the set of chunks of data [-and one chunk of data [. A set of routing information [among the nodes in the network [may be updated based on the assigned weights.

Dynamically detecting topology and egress nodes in communication networks

A network tap [] monitors traffic transmissions in a network []. The tap records transmission time information [] between data transmitted in the network. From the transmission time information, the tap calculates differences in transmission times [], and assumes the differences in transmission times are distributed as fractional gaussian noise. Housdorff dimensions are calculated for the fractional gaussian noise distributions. The Housdorff dimensions are used to generate traffic analysis information for the network, even when the data transmitted on the network is encrypted.

Fractal dimension analysis for data stream isolation

A method and system are provided for acquiring information about communication among nodes [in a network [by intercepting chunks of data in the network by a tap [located among the nodes [. A file [of data, including characteristics [of the intercepted chunks may be produced. The data may be converted into at least one time series and processed to produce prosody information. The prosody information may be used by prosody analysis.

Determining characteristics of received voice data packets to assist prosody analysis

A method of processing a communication signal may include computing a number of periodograms from the signal. Each of the periodograms may be generated from a portion of the signal. The number of periodograms may be combined in time sequence to form a spectrogram [containing the periodograms. A cepstrogram [may be generated by performing cepstrum processing on the spectrogram. The cepstrogram may be used to classify [the type of communication that produced the signal.

Methods and systems for simultaneously detecting short and long term periodicity for traffic flow identification

A system for passively analyzing an aggregation of communication signals simultaneously passing through a network link performs spectral analysis on a trace of communication traffic through the network link. The spectral analysis identifies period components of the trace corresponding to different communication signals. A system for deterring the passive analysis of signals aggregates communication traffic through a network link, such that a plurality of signals simultaneously pass through the network link. The plurality of signals is regulated such that the data packets corresponding to the plurality of signals leave the network link at a common rate. A memory temporarily stores the data packets as they enter the network link, and a timer maintains a fixed time interval for releasing the data packets from the memory.

Method and system for passively analyzing communication data based on frequency analysis of encrypted data traffic, and method and system for deterring passive analysis of communication data

A system for collecting events relating to multiple distributed physical systems includes multiple event collection cards ( ), each receiving events from one of the distributed physical systems. Each event collection card includes a time stamp clock ( ) configured to provide a time stamp when each event is received, an event memory ( ) configured to store the received events, a sync interface unit ( ) configured to receive a sync signal, a sync control unit ( ) configured to synchronize the time stamp clock ( ) to the sync signal received by the sync interface ( ), and a collection control unit ( ) configured to time stamp the collected events according to the time stamp clock ( ) synchronized to the sync signal, and to store the time stamped events in the event memory ( ).

System and method for logging computer event data and physical components of a complex distributed system

A method and apparatus is disclosed for optimizing the mapping of processes within a parallelized software program among individual processors in a high performance, scalable computing system. The resulting mapping enhances the usage of the available inter-processor communications bandwidth and balances the computational processing load among the processors of the system, improving upon mappings generated by skilled programmers.

System and method for automatically optimizing heterogenous multiprocessor software performance

An embedded genetic allocator system uses genetic algorithms to generate trial solutions to the allocation of data buffers among various kinds of memory banks and measures the quality of each solution. The quality is determined through the use of a monitoring system that accurately measures application execution times while maintaining low intrusiveness in the software execution. Because the allocation process is highly automated and based upon accurate performance data derived from actual system operation, optimal solutions to the allocation problem are reached much more quickly and efficiently than can be done using current, largely manual, approaches.

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Barrington, RI, United States of America

David Bruce Cousins