Patents by Inventor Georgios Tsolis

Georgios Tsolis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240005001
    Abstract: A computer system is provided. The computer system includes a memory and at least one processor coupled to the memory and configured to detect triggering of one or more threat detectors. The at least one processor is further configured to activate a subset of nodes from a plurality of nodes in a Bayesian network in response to the detection, the activated subset of nodes associated with the triggered threat detectors. The at least one processor is further configured to calculate a probability of malicious action using the Bayesian network to combine probabilities associated with the activated subset of nodes. The at least one processor is further configured to determine that the probability exceeds a threshold value. The at least one processor is further configured to perform a security action in response to the determination.
    Type: Application
    Filed: July 19, 2022
    Publication date: January 4, 2024
    Applicant: Citrix Systems, Inc.
    Inventors: Andreas Varnavas, Georgios Papaloukopoulos, Asterios Stergioudis, Dimitrios Markonis, Nikolaos Tsapakis, Georgios Tsolis
  • Patent number: 11792082
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: October 17, 2023
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Publication number: 20220116279
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Application
    Filed: October 27, 2021
    Publication date: April 14, 2022
    Applicant: Citrix Systems, Inc.
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Patent number: 11171838
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: November 9, 2021
    Assignee: CITRIX SYSTEMS, INC.
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Publication number: 20210306223
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Application
    Filed: March 23, 2021
    Publication date: September 30, 2021
    Applicant: Citrix Systems, Inc.
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Patent number: 10972358
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: April 6, 2021
    Assignee: Citrix Systems, Inc.
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Publication number: 20200351169
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Application
    Filed: July 20, 2020
    Publication date: November 5, 2020
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Patent number: 10721134
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: July 21, 2020
    Assignee: Citrix Systems, Inc.
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Patent number: 10594609
    Abstract: An apparatus and method of providing improved throughput on delay-based congestions comprising a packet engine and a delay-based congestion controller are provided. The packet engine detecting a delay jitter that is caused by a layer 2 retransmission of a data packet, is configured to measure a round trip time (RTT) value. The delay-based congestion controller is configured to receive the RTT value and to determine a smoothed RTT (SRTT) value using the RTT value and one or more moving average functions. The delay-based congestion controller is also configured to, if the SRTT value is smaller than a set minimum SRTT value, assign the SRTT value to the set minimum SRTT value. The delay-based congestion controller is further configured to, if the SRTT value is larger than a set maximum SRTT value, assign the SRTT value to the set maximum SRTT value.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: March 17, 2020
    Assignee: CITRIX SYSTEMS, INC.
    Inventors: Mustafa Kutluk Testicioglu, Georgios Tsolis, Lampros Dounis
  • Publication number: 20190068512
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Application
    Filed: March 28, 2018
    Publication date: February 28, 2019
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Publication number: 20190068453
    Abstract: Described embodiments provide systems and methods for inferring a network type and network conditions. The system includes a packet capturing engine configured to capture a plurality of network packets from a plurality of TCP network connections. The system includes a packet analyzer configured to analyze the plurality of network packets to generate a plurality of metrics. The system includes a network classifier configured to infer network types of the plurality of TCP connections based on the plurality of metrics and at least one classification model. The system also includes a conditions ranking engine configured to estimate a level of network congestion for each TCP connection based on the plurality of metrics and the network types.
    Type: Application
    Filed: March 28, 2018
    Publication date: February 28, 2019
    Inventors: Georgios Papaloukopoulos, Georgios Tsolis, Athanasios Kordelas, Aikaterini Kalou, Nicholas Stavrakos
  • Publication number: 20180270157
    Abstract: An apparatus and method of providing improved throughput on delay-based congestions comprising a packet engine and a delay-based congestion controller are provided. The packet engine detecting a delay jitter that is caused by a layer 2 retransmission of a data packet, is configured to measure a round trip time (RTT) value. The delay-based congestion controller is configured to receive the RTT value and to determine a smoothed RTT (SRTT) value using the RTT value and one or more moving average functions. The delay-based congestion controller is also configured to, if the SRTT value is smaller than a set minimum SRTT value, assign the SRTT value to the set minimum SRTT value. The delay-based congestion controller is further configured to, if the SRTT value is larger than a set maximum SRTT value, assign the SRTT value to the set maximum SRTT value.
    Type: Application
    Filed: May 17, 2018
    Publication date: September 20, 2018
    Inventors: MUSTAFA KUTLUK TESTICIOGLU, GEORGIOS TSOLIS, LAMPROS DOUNIS
  • Patent number: 9979653
    Abstract: An apparatus and method of providing improved throughput on delay-based congestions comprising a packet engine and a delay-based congestion controller. The packet engine detecting a delay jitter that is caused by a layer 2 retransmission of a data packet, is configured to measure a round trip time (RTT) value. The delay-based congestion controller is configured to receive the RTT value and to determine a smoothed RTT (SRTT) value using the RTT value and one or more moving average functions. The delay-based congestion controller is also configured to, if the SRTT value is smaller than a set minimum SRTT value, assign the SRTT value to the set minimum SRTT value. The delay-based congestion controller is further configured to, if the SRTT value is larger than a set maximum SRTT value, assign the SRTT value to the set maximum SRTT value.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: May 22, 2018
    Assignee: Citrix Systems, Inc.
    Inventors: Mustafa Kutluk Testicioglu, Georgios Tsolis, Lampros Dounis
  • Publication number: 20170118119
    Abstract: An apparatus and method of providing improved throughput on delay-based congestions comprising a packet engine and a delay-based congestion controller. The packet engine detecting a delay jitter that is caused by a layer 2 retransmission of a data packet, is configured to measure a round trip time (RTT) value. The delay-based congestion controller is configured to receive the RTT value and to determine a smoothed RTT (SRTT) value using the RTT value and one or more moving average functions. The delay-based congestion controller is also configured to, if the SRTT value is smaller than a set minimum SRTT value, assign the SRTT value to the set minimum SRTT value. The delay-based congestion controller is further configured to, if the SRTT value is larger than a set maximum SRTT value, assign the SRTT value to the set maximum SRTT value.
    Type: Application
    Filed: October 21, 2015
    Publication date: April 27, 2017
    Inventors: Mustafa Kutluk TESTICIOGLU, Georgios TSOLIS, Lampros DOUNIS
  • Patent number: 9471701
    Abstract: A method of web content and web services insertion is provided. The method includes receiving response data sent in response to request data, wherein the response data comprises a response header and a first webpage. The method also includes after a determination that insertion data is to be included with the first webpage, updating the response data by adding insertion data to the first webpage. The insertion data includes a script element that identifies a script that includes an instruction to display a second webpage within the first webpage. The method also includes providing the updated response data.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: October 18, 2016
    Assignee: Citrix Systems, Inc.
    Inventor: Georgios Tsolis
  • Patent number: 9075877
    Abstract: A system and method that allows Rich Internet Applications content to be adapted for a web browser on a mobile device without requiring an installation of an RIA player. The method comprises receiving processing a request by communicating with the web server to acquire the RIA file and the parameters used to instantiate the RIA file, adapting the RIA content of the RIA file for display in the web browser without requiring an RIA player at the mobile device, and providing adapted RIA content to the web browser.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: July 7, 2015
    Assignee: Citrix Systems Inc.
    Inventors: Georgios Tsolis, Paraskevas Zafiris, Spyridon Vathis
  • Publication number: 20140006924
    Abstract: A method of web content and web services insertion is provided. The method includes receiving response data sent in response to request data, wherein the response data comprises a response header and a first webpage. The method also includes after a determination that insertion data is to be included with the first webpage, updating the response data by adding insertion data to the first webpage. The insertion data includes a script element that identifies a script that includes an instruction to display a second webpage within the first webpage. The method also includes providing the updated response data.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 2, 2014
    Inventor: Georgios TSOLIS
  • Publication number: 20140006548
    Abstract: A system and method that allows Rich Internet Applications content to be adapted for a web browser on a mobile device without requiring an installation of an RIA player. The method comprises receiving processing a request by communicating with the web server to acquire the RIA file and the parameters used to instantiate the RIA file, adapting the RIA content of the RIA file for display in the web browser without requiring an RIA player at the mobile device, and providing adapted RIA content to the web browser.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Inventors: Georgios Tsolis, Paraskevas Zafiris, Spyridon Vathis