Patents by Inventor Van Quy Tu
Van Quy Tu 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).
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Patent number: 10296755Abstract: A computing device and a method for a computing device to control access to data stored on a data store of the device. An access component of the device having control over access to the data. The access component being operative to receive a request for data from a requesting component, identify an assigned access domain of the requesting component and an assigned data domain of the requested data and determine whether the requesting component is authorized to access the data by comparing the assigned access domain and the data domain with permissions specified in a security policy. If the assigned access domain is authorized to access the data domain, the access component may provide access to the requested data.Type: GrantFiled: December 28, 2015Date of Patent: May 21, 2019Assignee: BlackBerry LimitedInventors: Christopher Lyle Bender, Van Quy Tu, Daniel Jonas Major, Jonathan Raymond Cardy
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Patent number: 9785917Abstract: A first email message associated with a mobile communication device of a user is conveyed to a destination. The first email message comprises a forwarded portion of a second email message that has been previously archived by an email server associated with the user. The step of conveying comprises the step of obtaining the forwarded portion of the second email message without intervention of the user.Type: GrantFiled: August 17, 2010Date of Patent: October 10, 2017Assignee: BlackBerry LimitedInventors: Neil Patrick Adams, Van Quy Tu
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Publication number: 20160314310Abstract: A computing device and a method for a computing device to control access to data stored on a data store of the device. An access component of the device having control over access to the data. The access component being operative to receive a request for data from a requesting component, identify an assigned access domain of the requesting component and an assigned data domain of the requested data and determine whether the requesting component is authorized to access the data by comparing the assigned access domain and the data domain with permissions specified in a security policy. If the assigned access domain is authorized to access the data domain, the access component may provide access to the requested data.Type: ApplicationFiled: December 28, 2015Publication date: October 27, 2016Applicant: BlackBerry LimitedInventors: Christopher Lyle BENDER, Van Quy Tu, Daniel Jonas Major, Jonathan Raymond Cardy
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Patent number: 9300654Abstract: In a certification request, a user device includes an object identifier. When a certification authority generates an identity certificate responsive to receiving the certification request, the certification authority includes the object identifier, thereby allowing improved management of the identity certificate at the user device and elsewhere.Type: GrantFiled: August 8, 2014Date of Patent: March 29, 2016Assignee: BlackBerry LimitedInventors: Van Quy Tu, Neil Patrick Adams
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Patent number: 9264448Abstract: An apparatus, and an associated method, facilitates security at a wireless device, such as a wireless device comprising a mobile computing platform. A security decision engine is provided that monitors for an event necessitating a security decision. When a security decision is required, request is made of a knowledge fetcher, provided by a trusted third-party, installed at the wireless device for the security decision. The knowledge fetcher obtains the security decision, such as by obtaining the security decision from a remote, trusted third-party server, and provides the security decision to the decision engine. Use is made of the security decision pursuant to a setting for which the security decision is needed.Type: GrantFiled: July 1, 2010Date of Patent: February 16, 2016Assignee: BlackBerry LimitedInventors: Daniel Jonas Major, Oliver Whitehouse, Neil Patrick Adams, Christopher Lyle Bender, Van Quy Tu
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Patent number: 9225727Abstract: A computing device and a method for a computing device to control access to data stored on a data store of the device. An access component of the device having control over access to the data. The access component being operative to receive a request for data from a requesting component, identify an assigned access domain of the requesting component and an assigned data domain of the requested data and determine whether the requesting component is authorized to access the data by comparing the assigned access domain and the data domain with permissions specified in a security policy. If the assigned access domain is authorized to access the data domain, the access component may provide access to the requested data.Type: GrantFiled: March 29, 2011Date of Patent: December 29, 2015Assignee: BLACKBERRY LIMITEDInventors: Christopher Lyle Bender, Van Quy Tu, Daniel Jonas Major, Jonathan Raymond Cardy
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Patent number: 9071580Abstract: A method and system for securing data of a mobile communications device. The method includes: determining that first application data is data associated with a first server; encrypting the first application data with an encryption key stored in the mobile communications device; storing the encrypted first application data on a memory; receiving a request to access the first application data from an application or a service implemented from the mobile communications device; determining that the application or service is authorized to access the first application data; and in response to said determining, decrypting the first application data with the encryption key.Type: GrantFiled: September 2, 2011Date of Patent: June 30, 2015Assignee: BlackBerry LimitedInventors: Nicole Pigeon, Van Quy Tu
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Publication number: 20150019863Abstract: In a certification request, a user device includes an object identifier. When a certification authority generates an identity certificate responsive to receiving the certification request, the certification authority includes the object identifier, thereby allowing improved management of the identity certificate at the user device and elsewhere.Type: ApplicationFiled: August 8, 2014Publication date: January 15, 2015Inventors: Van Quy TU, Neil Patrick ADAMS
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Patent number: 8924742Abstract: Rather than storing all data in the same manner, e.g., an encrypted manner, a security level with which to associate received data of a given type may be determined. Subsequently, distinct types of data may be stored in a distinct manner, with the manner of storage having a security level appropriate to the type of data. For example, a first type of data may be stored in an encrypted manner (i.e., with a high level of security), while a second level of data may be stored in a plain text manner (i.e., with a low level of security).Type: GrantFiled: February 11, 2009Date of Patent: December 30, 2014Assignee: BlackBerry LimitedInventors: Kristof Takacs, Neil Patrick Adams, Ravi Singh, Van Quy Tu
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Patent number: 8904544Abstract: Data received at, or created on, a device may be tagged as corporate dependent upon a service over which the data is received or an application in which the data is created. When a user attempts to insert tagged data into a data item that is to be transmitted by the device, the insertion may be prevented. Similarly, the transmission of tagged data may be restricted to only occur on a secure service.Type: GrantFiled: April 13, 2011Date of Patent: December 2, 2014Assignee: BlackBerry LimitedInventors: Van Quy Tu, Adrian Michael Logan, Andrew John Ewanchuk, Imtiaz Nadaf
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Patent number: 8874678Abstract: An electronic communication device may, perhaps with the assistance of a mobile device server, determining that a new electronic message received by the device is part of a message thread that includes the new message and at least one prior electronic message previously received at the device. A comparison may be made of address information of the new message with address information of the at least one prior electronic message in the message thread to determine that there has been a change in addressed recipients between the new message and the at least one prior electronic message. The device may then notify a user of the device of the change.Type: GrantFiled: July 16, 2013Date of Patent: October 28, 2014Assignee: BlackBerry LimitedInventor: Van Quy Tu
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Patent number: 8826009Abstract: In a certification request, a user device includes an object identifier. When a certification authority generates an identity certificate responsive to receiving the certification request, the certification authority includes the object identifier, thereby allowing improved management of the identity certificate at the user device and elsewhere.Type: GrantFiled: September 26, 2012Date of Patent: September 2, 2014Assignee: BlackBerry LimitedInventors: Van Quy Tu, Neil Patrick Adams
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Patent number: 8826007Abstract: To validate a received certificate issuance notification message, a device may verify that the certificate issuance notification message conforms to expected norms or authenticate a signature associate with the certificate issuance notification message. Upon validating, the device may then transmit a uniform resource locator, extracted from the certificate issuance notification message, to a network entity configured for processing certificate issuance.Type: GrantFiled: July 23, 2012Date of Patent: September 2, 2014Assignee: BlackBerry LimitedInventors: Alexander Truskovsky, Van Quy Tu, Cheryl Mok, Shivangi Gandhi, Eli Jackson, Neil Patrick Adams
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Patent number: 8792636Abstract: Through the use of a one-time-use nonce, the transfer of cryptographic data over a potentially insecure link in a two-factor content protection system is avoided. The nonce may be stored encrypted with a public key from a smart card. A random key may be used to produce a storage key, which is used to encrypt a content protection key. The random key may be stored, encrypted with a key derived from the nonce. Instead of receiving a raw content protection key over the potentially insecure link, the raw nonce is received and, once used, replaced with a new nonce.Type: GrantFiled: August 27, 2010Date of Patent: July 29, 2014Assignee: BlackBerry LimitedInventors: Van Quy Tu, Herbert Anthony Little, Kristof Takacs
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Patent number: 8781128Abstract: A method for handling an encrypted message received on an electronic device that has not been encrypted using a current public key. The portable electronic device automatically generates a reply message to the sender in response to determining that the message has not been encrypted with the current public key. The reply message may contain the current public key of the recipient device, and may request the sender to resend the message encrypted with the current public key.Type: GrantFiled: January 28, 2013Date of Patent: July 15, 2014Assignee: BlackBerry LimitedInventors: Shivangi Anantrupa Gandhi, Ravi Singh, Neil Patrick Adams, Van Quy Tu
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Patent number: 8601558Abstract: Rather than managing a certificate chain related to a newly issued identity certificate at a terminal to which a wireless device occasionally connects, a certificate server can act to determine the identity certificates in a certificate chain related to the newly issued identity certificate. The certificate server can also act to obtain the identity certificates and transmit the identity certificates towards the device that requested the newly issued identity certificate. A mail server may receive the newly issued identity certificate and the identity certificates in the certificate chain and manage the timing of the transmittal of the identity certificates. By transmitting the identity certificates in the certificate chain before transmitting the newly issued identity certificate, the mail server allows the user device to verify the authenticity of the newly issued identity certificate.Type: GrantFiled: November 15, 2012Date of Patent: December 3, 2013Assignee: Blackberry LimitedInventors: Cheryl Wing-Yee Mok, Van Quy Tu
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Publication number: 20130311585Abstract: An electronic communication device may, perhaps with the assistance of a mobile device server, determining that a new electronic message received by the device is part of a message thread that includes the new message and at least one prior electronic message previously received at the device. A comparison may be made of address information of the new message with address information of the at least one prior electronic message in the message thread to determine that there has been a change in addressed recipients between the new message and the at least one prior electronic message. The device may then notify a user of the device of the change.Type: ApplicationFiled: July 16, 2013Publication date: November 21, 2013Applicant: Research In Motion LimitedInventor: Van Quy TU
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Patent number: 8583937Abstract: A method and apparatus for securing a computing device are provided. A state of the computing device is determined, the state associated with a protection state. The computing device is automatically switching between a plurality of security levels at based on the state.Type: GrantFiled: December 16, 2010Date of Patent: November 12, 2013Assignee: BlackBerry LimitedInventors: Neil Patrick Adams, Herbert Anthony Little, Van Quy Tu
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Patent number: 8566911Abstract: Methods and devices for obtaining authorization for a requestor to access a service are provided. In accordance with one embodiment, there is provided a method comprising receiving a requestor request for access to a service; sending an authorization request to one or more mobile devices associated with one or more authorizers on a first approval list; receiving an authorization response from the one or more mobile devices associated with the one or more authorizers on the first approval list; determining whether a predetermined level of authorization is received; and when the predetermined level of authorization is received, authorizing access to the service.Type: GrantFiled: October 6, 2010Date of Patent: October 22, 2013Assignees: BlackBerry Limited, Certicom Corp.Inventors: Van Quy Tu, Herbert Anthony Little, Anthony Rosati, Matthew John Campagna
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Patent number: 8538022Abstract: Often, for reasons of wireless bandwidth conservation, incomplete messages are provided to wireless messaging devices. Employing cryptography, for secrecy or authentication purposes, when including a received message that has been incompletely received can lead to lack of context on the receiver's end. By automatically obtaining the entirety of the message to be included, an outgoing message that includes the received message can be processed in a manner that securely and accurately represents the intended outgoing message.Type: GrantFiled: June 4, 2009Date of Patent: September 17, 2013Assignee: BlackBerry LimitedInventors: Van Quy Tu, Neil Patrick Adams