Cristi
Cristi Estan, La Jolla, CA US
Patent application number | Description | Published |
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20080307524 | Detecting Public Network Attacks Using Signatures and Fast Content Analysis - Network worms or viruses are a growing threat to the security of public and private networks and the individual computers that make up those networks. A content sifting method if provided that automatically generates a precise signature for a worm or virus that can then be used to significantly reduce the propagation of the worm elsewhere in the network or eradicate the worm altogether. The content sifting method is complemented by a value sampling method that increases the throughput of network traffic that can be monitored. Together, the methods track the number of times invariant strings appear in packets and the network address dispersion of those packets including variant strings. When an invariant string reaches a particular threshold of appearances and address dispersion, the string is reported as a signature for suspected worm. | 12-11-2008 |
Cristi Starasciuc, Bucharest RO
Patent application number | Description | Published |
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20140019626 | PROVIDING UNIFIED COMMUNICATIONS SERVICES - Methods and apparatuses, including computer program products, are described for providing unified communication services for communication sessions between client devices. A plurality of globally-distributed computing device clusters are coupled to each other over a communication network. Each cluster is configured to receive, from a client device, a transaction request associated with a communication session, including a presence event. Each cluster comprises a SIP server configured to process the transaction request, an event queue configured to extract the presence event from the transaction request for storage in the event queue, and a session state handler configured to retrieve the presence event from the event queue and notify an XMPP server of the presence event. The SIP server, XMPP server, and session state handler each stores and retrieves data associated with the communication session in a database shard at the cluster. The shards of each cluster collectively comprise a single logical database. | 01-16-2014 |
Cristi Zegheru, Bucharest RO
Patent application number | Description | Published |
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20110291627 | Voltage regulator - The invention relates to a voltage regulator having a differentiating circuit and an amplifier, the differentiating circuit being designed to detect a voltage at the voltage regulator connection and to provide it as a differentiated signal at its differentiating output, and the amplifier being designed to inject a compensation signal dependent on the differentiated signal into an input connection of an output circuit of the voltage regulator. | 12-01-2011 |