Patents by Inventor Amarnath Mullick

Amarnath Mullick 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).

  • Patent number: 8656462
    Abstract: Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include a state manager that is used to identify and maintain the source associated with a client browser that submits requests to the state manager. The state manager can allow requests that are authorized and request authorization for requests that are not. The state manager can maintain the states associated with each domain to reduce the number of transaction needed to authenticate and/or authorize subsequent requests to the same domain or to different domains.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: February 18, 2014
    Assignee: Zscaler, Inc.
    Inventors: Kailash Kailash, Shashidhara Mysore Nanjundaswamy, Amarnath Mullick, Jose Raphel
  • Publication number: 20130304881
    Abstract: A method for intercepting, by an agent of a client, communications from the client to be transmitted via a virtual private network connection includes the step of intercepting communications based on identification of an application from which the communication originates. The agent receives information identifying a first application. The agent determines a network communication transmitted by the client originates from the first application and intercepts that communication. The agent transmits the intercepted communication via the virtual private network connection.
    Type: Application
    Filed: July 16, 2013
    Publication date: November 14, 2013
    Inventors: Charu Venkatraman, Junxiao He, Amarnath Mullick, Shashi Nanjundaswamy, James Harris, Ajay Soni
  • Patent number: 8495181
    Abstract: A method for intercepting, by an agent of a client, communications from the client to be transmitted via a virtual private network connection includes the step of intercepting communications based on identification of an application from which the communication originates. The agent receives information identifying a first application. The agent determines a network communication transmitted by the client originates from the first application and intercepts that communication. The agent transmits the intercepted communication via the virtual private network connection.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: July 23, 2013
    Assignee: Citrix Systems, Inc
    Inventors: Charu Venkatraman, Junxiao He, Amarnath Mullick, Shashi Nanjundaswamy, James Harris, Ajay Soni
  • Publication number: 20130152162
    Abstract: An appliance and method for authorizing a level of access of a client to a virtual private network connection, based on a client-side attribute includes the step of establishing, by an appliance, a control connection with a client upon receiving a client request to establish a virtual private network connection with a network. The appliance transmits, via the control connection, a request to the client to evaluate at least one clause of a security string, the at least one clause including an expression associated with a client-side attribute. The client transmits, via the control connection, a response to the appliance comprising a result of evaluating the at least one clause by the client. The appliance assigns the client to an authorization group based on the result of evaluation of the at least one clause.
    Type: Application
    Filed: February 6, 2013
    Publication date: June 13, 2013
    Inventors: AMARNATH MULLICK, Charu Venkatraman, Shashi Nanjundaswamy, Junxiao He, Ajay Soni
  • Patent number: 8413229
    Abstract: In a method and appliance for authenticating, by an appliance, a client to access a virtual network connection, based on an attribute of a client-side certificate, a client authentication certificate is requested from a client. A value of at least one field in the client authentication certificate received from the client is identified. One of a plurality of types of access is assigned responsive to an application of a policy to the identified value of the at least one field, each of the plurality of access types associated with at least one connection characteristic.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: April 2, 2013
    Assignee: Citrix Systems, Inc.
    Inventors: Amarnath Mullick, Shashi Nanjundaswamy, Ajay Soni
  • Patent number: 8397287
    Abstract: An appliance and method for authorizing a level of access of a client to a virtual private network connection, based on a client-side attribute includes the step of establishing, by an appliance, a control connection with a client upon receiving a client request to establish a virtual private network connection with a network. The appliance transmits, via the control connection, a request to the client to evaluate at least one clause of a security string, the at least one clause including an expression associated with a client-side attribute. The client transmits, via the control connection, a response to the appliance comprising a result of evaluating the at least one clause by the client. The appliance assigns the client to an authorization group based on the result of evaluation of the at least one clause.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: March 12, 2013
    Assignee: Citrix Systems, Inc.
    Inventors: Amarnath Mullick, Shashi Nanjundaswamy, Ajay Soni, Charu Venkatraman, Max He
  • Patent number: 8151323
    Abstract: The present invention relates to systems and methods to identify a level of access for a resource being accessed via a secure socket layer virtual private network (SSL VPN) connection to a network, and to control the action on the resource based on the identified level of access. The appliance described herein provides intelligent secure access and action control to resources based on a sense and respond mechanism. When a user requests access to a resource via the SSL VPN connection of the appliance, the appliance obtains information about the client to determine the user access scenario—the location, device, connection and identify of the user or client.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: April 3, 2012
    Assignee: Citrix Systems, Inc.
    Inventors: James Harris, Max He, Arkesh Kumar, Ajay Soni, Charu Venkatraman, Shashi Najundaswamy, Amarnath Mullick
  • Patent number: 8132247
    Abstract: The SSL VPN session failover solution of the appliance and/or client agent described herein provides an environment for handling IP address assignment and end point re-authorization upon failover. The appliances may be deployed to provide a session failover environment in which a second appliance is a backup to a first appliance when a failover condition is detected, such as failure in operation of the first appliance. The backup appliance takes over responsibility for SSL VPN sessions provided by the first appliance. In the failover environment, the first appliance propagates SSL VPN session information including user IP address assignment and end point authorization information to the backup appliance. The backup appliance maintains this information. Upon detection of failover of the first appliance, the backup appliance activates the transferred SSL VPN session and maintains the user assigned IP addresses. The backup appliance may also re-authorize the client for the transferred SSL VPN session.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: March 6, 2012
    Assignee: Citrix Systems, Inc.
    Inventors: Saibal Adhya, Akshat Choudhary, Sergey Verzunov, Amarnath Mullick, Shashi Nanjundaswamy, Arkesh Kumar
  • Patent number: 7907621
    Abstract: Systems and methods are described for using a client agent executing on a client to send ICMP messages to an appliance connected via a virtual private network Methods include: establishing, via a client agent executing on a client, a transport layer virtual private network connection with an appliance; intercepting, by the client agent at the network layer, an ICMP request originating from the client; and transmitting, by the client agent via a transport layer connection, the ICMP request to the appliance. Addition methods describe determining, by the appliance, the address identified by the ICMP request corresponds to a second client, the second client also connected via a virtual private network to the remote machine; and transmitting, by the appliance to the second client via the virtual private network connection, the ICMP request. Corresponding systems are also described.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: March 15, 2011
    Assignee: Citrix Systems, Inc.
    Inventors: Amarnath Mullick, Charu Venkatraman, Shashi Nanjundaswamy, Junxiao He, Roy Rajan, Ajay Soni
  • Patent number: 7843912
    Abstract: A method for intercepting communication of a client to a destination on a virtual private network includes an agent executing on the client that intercepts a network communication of the client. The agent provides a virtual private network connection from a first network to a second network. The decision to intercept is based on a network destination description or an identification of an application authorized to be accessed via the virtual private network. In one case, the agent determines that a destination specified by the intercepted communication corresponds to a network identifier and a port of a network destination description of an application on the second network authorized for access via the virtual private network. In response to this determination, the agent transmits the intercepted communication.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: November 30, 2010
    Assignee: Citrix Systems, Inc.
    Inventors: James Harris, Charu Venkatraman, Junxiao He, Amarnath Mullick, Shashi Nanjundaswamy, Ajay Soni
  • Publication number: 20100020967
    Abstract: Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include an epoch manager that is used to generate authentication and authorization data that remain valid only for an epoch. The epoch manager can generate an epoch key pair that can be used to encrypt and decrypt the authentication and authorization data during the epoch that the key is valid. The epoch manager can also associate the contents of the data with the epoch in which it was created, so that at decrypting the epoch that the data was generated in can be identified.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 28, 2010
    Applicant: SafeChannel Inc.
    Inventors: Kailash Kailash, Shashidhara Mysore Nanjundaswamy, Amarnath Mullick, Jose Raphel
  • Publication number: 20100024006
    Abstract: Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include a state manager that is used to identify and maintain the source associated with a client browser that submits requests to the state manager. The state manager can allow requests that are authorized and request authorization for requests that are not. The state manager can maintain the states associated with each domain to reduce the number of transaction needed to authenticate and/or authorize subsequent requests to the same domain or to different domains.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 28, 2010
    Applicant: SafeChannel Inc.
    Inventors: Kailash Kailash, Shashidhara Mysore Nanjundaswamy, Amarnath Mullick, Jose Raphel
  • Publication number: 20100023762
    Abstract: Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include an epoch processor that is used to validate authentication and authorization data that is valid only for an epoch. The epoch processor can maintain a public key that can be used to decrypt the authentication and authorization data during the epoch that the key is valid. The epoch processor can receive a new public key during each epoch. The epoch processor can also determine if the authentication or authorization data was fraudulently generated based on the contents of the data, and verifying whether the data is valid for the epoch in which it was decrypted.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 28, 2010
    Applicant: SafeChannel Inc.
    Inventors: Kailash Kailash, Shashidhara Mysore Nanjundaswamy, Amarnath Mullick, Jose Raphel
  • Publication number: 20100024014
    Abstract: Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include a source processor that is used to identify the source associated with a request for authentication or authorization. The source processor can maintain the initial source associated with the request through the use of an association token. The associate token can be transmitted with each subsequent request that includes authentication or authorization data. The source processor can use the associate token to verify that the source associated with the initial request is the same as the source associated with subsequent authentication and authorization requests.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 28, 2010
    Applicant: SafeChannel Inc.
    Inventors: Kailash Kailash, Shashidhara Mysore Nanjundaswamy, Amarnath Mullick, Jose Raphel
  • Publication number: 20090037998
    Abstract: The SSL VPN session failover solution of the appliance and/or client agent described herein provides an environment for handling IP address assignment and end point re-authorization upon failover. The appliances may be deployed to provide a session failover environment in which a second appliance is a backup to a first appliance when a failover condition is detected, such as failure in operation of the first appliance. The backup appliance takes over responsibility for SSL VPN sessions provided by the first appliance. In the failover environment, the first appliance propagates SSL VPN session information including user IP address assignment and end point authorization information to the backup appliance. The backup appliance maintains this information. Upon detection of failover of the first appliance, the backup appliance activates the transferred SSL VPN session and maintains the user assigned IP addresses. The backup appliance may also re-authorize the client for the transferred SSL VPN session.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 5, 2009
    Inventors: Saibal Adhya, Akshat Choudhary, Sergey Verzunov, Amarnath Mullick, Shashi Nanjundaswamy, Arkesh Kumar
  • Publication number: 20090037763
    Abstract: The SSL VPN session failover solution of the appliance and/or client agent described herein provides an environment for handling IP address assignment and end point re-authorization upon failover. The appliances may be deployed to provide a session failover environment in which a second appliance is a backup to a first appliance when a failover condition is detected, such as failure in operation of the first appliance. The backup appliance takes over responsibility for SSL VPN sessions provided by the first appliance. In the failover environment, the first appliance propagates SSL VPN session information including user IP address assignment and end point authorization information to the backup appliance. The backup appliance maintains this information. Upon detection of failover of the first appliance, the backup appliance activates the transferred SSL VPN session and maintains the user assigned IP addresses. The backup appliance may also re-authorize the client for the transferred SSL VPN session.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 5, 2009
    Inventors: Saibal Adhya, Akshat Choudhary, Shashi Nanjundaswamy, Sergey Verzunov, Arkesh Kumar, Amarnath Mullick
  • Publication number: 20080072311
    Abstract: In a method and appliance for authenticating, by an appliance, a client to access a virtual network connection, based on an attribute of a client-side certificate, a client authentication certificate is requested from a client. A value of at least one field in the client authentication certificate received from the client is identified. One of a plurality of types of access is assigned responsive to an application of a policy to the identified value of the at least one field, each of the plurality of access types associated with at least one connection characteristic.
    Type: Application
    Filed: August 21, 2006
    Publication date: March 20, 2008
    Inventors: Amarnath Mullick, Shashi Nanjundaswamy, Ajay Soni
  • Publication number: 20080046993
    Abstract: An appliance and method for authorizing a level of access of a client to a virtual private network connection, based on a client-side attribute includes the step of establishing, by an appliance, a control connection with a client upon receiving a client request to establish a virtual private network connection with a network. The appliance transmits, via the control connection, a request to the client to evaluate at least one clause of a security string, the at least one clause including an expression associated with a client-side attribute. The client transmits, via the control connection, a response to the appliance comprising a result of evaluating the at least one clause by the client. The appliance assigns the client to an authorization group based on the result of evaluation of the at least one clause.
    Type: Application
    Filed: August 21, 2006
    Publication date: February 21, 2008
    Inventors: Amarnath Mullick, Charu Venkatraman, Shashi Nanjundaswamy, Junxiao He, Ajay Soni
  • Publication number: 20080034418
    Abstract: A method for intercepting, by an agent of a client, communications from the client to be transmitted via a virtual private network connection includes the step of intercepting communications based on identification of an application from which the communication originates. The agent receives information identifying a first application. The agent determines a network communication transmitted by the client originates from the first application and intercepts that communication. The agent transmits the intercepted communication via the virtual private network connection.
    Type: Application
    Filed: August 3, 2006
    Publication date: February 7, 2008
    Inventors: Charu Venkatraman, Junxiao He, Amarnath Mullick, Shashi Nanjundaswami, James Harris, Ajay Soni
  • Publication number: 20080031265
    Abstract: Systems and methods are described for using a client agent executing on a client to send ICMP messages to an appliance connected via a virtual private network Methods include: establishing, via a client agent executing on a client, a transport layer virtual private network connection with an appliance; intercepting, by the client agent at the network layer, an ICMP request originating from the client; and transmitting, by the client agent via a transport layer connection, the ICMP request to the appliance. Addition methods describe determining, by the appliance, the address identified by the ICMP request corresponds to a second client, the second client also connected via a virtual private network to the remote machine; and transmitting, by the appliance to the second client via the virtual private network connection, the ICMP request. Corresponding systems are also described.
    Type: Application
    Filed: August 3, 2006
    Publication date: February 7, 2008
    Inventors: Amarnath Mullick, Charu Venkatraman, Shashi Nanjundaswami, Junxiao He, Roy Rajan, Ajay Soni