Patents by Inventor Quentin Liu

Quentin Liu 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: 11924193
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, consumes the new OCSP responses using the cache keys.
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: March 5, 2024
    Assignee: DigiCert, Inc.
    Inventors: Richard F. Andrews, Quentin Liu
  • Publication number: 20220191189
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, consumes the new OCSP responses using the cache keys.
    Type: Application
    Filed: December 22, 2021
    Publication date: June 16, 2022
    Inventors: Richard F. Andrews, Quentin Liu
  • Patent number: 11251974
    Abstract: A method of provisioning a first digital certificate and a second digital certificate based on an existing digital certificate includes receiving information related to the existing digital certificate. The existing digital certificate includes a first name listed in a Subject field and a second name listed in a SubjectAltName extension. The method also includes receiving an indication from a user to split the existing digital certificate and extracting the first name from the Subject field and the second name from the SubjectAltName extension of the existing digital certificate. The method further includes extracting the public key from the existing digital certificate, provisioning the first digital certificate with the first name listed in a Subject field of the first digital certificate and the public key, and provisioning the second digital certificate with the second name listed in a Subject field of the second digital certificate and the public key.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: February 15, 2022
    Assignee: DigiCert, Inc.
    Inventors: Quentin Liu, Marc Williams, Richard F. Andrews
  • Patent number: 11212274
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, consumes the new OCSP responses using the cache keys.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: December 28, 2021
    Assignee: DigiCert, Inc.
    Inventors: Richard F. Andrews, Quentin Liu
  • Publication number: 20200127997
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, consumes the new OCSP responses using the cache keys.
    Type: Application
    Filed: August 29, 2019
    Publication date: April 23, 2020
    Inventors: Richard F. ANDREWS, Quentin LIU
  • Patent number: 10404681
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, consumes the new OCSP responses using the cache keys.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: September 3, 2019
    Assignee: DigiCert, Inc.
    Inventors: Richard F. Andrews, Quentin Liu
  • Patent number: 10366250
    Abstract: The disclosed computer-implemented method for protecting personally identifiable information during electronic data exchanges may include (i) receiving, from a computing device, an authentication token for a proposed electronic data exchange, (ii) preventing the user's personally identifiable information from entering the proposed electronic data exchange by identifying the user using the anonymized identifier rather than using the user's personally identifiable information, (iii) authenticating the user identified in the data exchange information, and (iv) in response to authenticating the user, authorizing completion of the proposed electronic data exchange. Various other methods, systems, and computer-readable media are also disclosed.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: July 30, 2019
    Assignee: Symantec Corporation
    Inventors: Joseph Chen, Arvind Rao, Quentin Liu
  • Patent number: 10110592
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, serves requests for the OCSP responses using the cache keys. For new certificates, a private CDN is pre-populated with an OCSP response for a certificate concurrent with that certificate being issued. Doing so effectively uses the PCDN as an origin server for OCSP responses, reducing CA infrastructure needs.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: October 23, 2018
    Assignee: DigiCert, Inc.
    Inventors: Hari Veladanda, Ning Chai, Richard F. Andrews, Quentin Liu
  • Patent number: 9979725
    Abstract: A system for two-way authentication using two-dimensional codes is provided. The system includes a memory and a processor coupled to the memory. The processor is to generate a two-dimensional code to be used by a user of a mobile device for accessing a remote resource. The processor is to generate the code in response to a request from the remote resource for the code. The processor is further to receive an authentication request from the mobile device to authenticate the remote resource. The authentication request includes information obtained from the two-dimensional code, the information including an authentication request identifier. The processor is also to compare the authentication request identifier to an expected value to create an authentication indication and to transmit the authentication indication and an authentication credential to the mobile device to authenticate the user to the remote resource.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: May 22, 2018
    Assignee: Symantec Corporation
    Inventors: Quentin Liu, William Gauvin, Robert Walters
  • Publication number: 20180124042
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, consumes the new OCSP responses using the cache keys.
    Type: Application
    Filed: December 21, 2017
    Publication date: May 3, 2018
    Inventors: Richard F. Andrews, Quentin Liu
  • Patent number: 9887982
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, consumes the new OCSP responses using the cache keys.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: February 6, 2018
    Assignee: DigiCert, Inc.
    Inventors: Richard F. Andrews, Quentin Liu
  • Patent number: 9830458
    Abstract: Techniques are presented herein for classifying a variety of enterprise computing resources based on asset characteristics. In particular, a computing asset, e.g., a server, may be classified based on any digital certificates provisioned on that server. That is, the properties of a digital certificate may be used to determine a measure of business value or importance of a server (or data hosted on that server). Once the computing asset has been classified, a monitoring system may use the assigned classifications to prioritize security incidents for review.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: November 28, 2017
    Assignee: Symantec Corporation
    Inventors: Kevin McBride, Quentin Liu, Hari Veladanda, George Tomic, Peter Ashley
  • Patent number: 9794248
    Abstract: A method for managing payment of digital certificates includes receiving a request to issue a digital certificate to a subscriber, capturing and saving payment information of the subscriber, performing a first authentication and verification of the subscriber at a first time, and performing at least one additional authentication and verification of the subscriber at least once every authentication period. A long-lived certificate is issued to the subscriber provided the subscriber is authenticated and verified. The long-lived certificate is valid for an expiration period. However, the long-lived certificate is revoked if (1) the additional authentications and verification produce invalid results, or (2) if payment is not received during a payment period. The authentication period is shorter than the expiration period and there are at least a first and a second authentication period within the expiration period. The expiration period is longer than the authentication period.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: October 17, 2017
    Assignee: Symantec Corporation
    Inventors: Quentin Liu, Kathleen Elizabeth Barnes, Richard F. Andrews
  • Patent number: 9680819
    Abstract: A method of renewing a plurality of digital certificates includes receiving, at a first time, a request from a user to renew a first digital certificate and determining an expiration date for the first digital certificate. The method also includes receiving, at a second time, a request from the user to renew a second digital certificate and determining an expiration date for the second digital certificate. The expiration date for the second certificate is later than the expiration date for the first certificate. The method further includes determining a new expiration date occurring after the first time and the second time and renewing the first digital certificate. An expiration date for the renewed first digital certificate is equal to the new expiration date. Moreover, the method includes renewing the second digital certificate. An expiration date for the renewed second digital certificate is equal to the new expiration date.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: June 13, 2017
    Assignee: Symantec Corporation
    Inventors: Quentin Liu, Kathleen Barnes, Richard F. Andrews
  • Patent number: 9338164
    Abstract: A system for two-way authentication using two-dimensional codes is provided herein. The system includes a memory and a processor coupled to the memory. The processor is to receive a request from a remote device to access a web resource and to generate a two-dimensional code to be sent from the remote device to an authentication service to authenticate the web resource. The two-dimensional code includes an authentication request identifier. The processor is further to receive an authentication credential from the remote device, the authentication credential being obtained from the authentication service, and to authenticate the user of the remote device to the web resource using the authentication credential.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: May 10, 2016
    Assignee: Symantec Corporation
    Inventors: Quentin Liu, William Gauvin, Robert Walters
  • Publication number: 20150310215
    Abstract: Techniques are presented herein for classifying a variety of enterprise computing resources based on asset characteristics. In particular, a computing asset, e.g., a server, may be classified based on any digital certificates provisioned on that server. That is, the properties of a digital certificate may be used to determine a measure of business value or importance of a server (or data hosted on that server). Once classified, a monitoring system may use the assigned classifications to prioritize security incidents for review.
    Type: Application
    Filed: April 25, 2014
    Publication date: October 29, 2015
    Applicant: SYMANTEC CORPORATION
    Inventors: Kevin McBRIDE, Quentin LIU, Hari VELADANDA, George TOMIC, Peter ASHLEY
  • Patent number: 9100191
    Abstract: A method for forming a digital certificate includes receiving contact information associated with the digital certificate. The contact information includes at least a name, a mailing address, and an email address. The method also includes receiving billing information associated with the digital certificate and receiving a Certificate Signing Request (CSR) for the digital certificate. The method further includes receiving a first name for use in forming the digital certificate and receiving a second name for use in forming the digital certificate. Moreover, the method includes receiving an indication of a vendor of web server software, receiving an indication of a service period for the digital certificate, and forming the digital certificate. The first name is stored in a Subject field of the digital certificate and the second name is stored in the SubjectAltName extension of the digital certificate.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: August 4, 2015
    Assignee: Symantec Corporation
    Inventors: Quentin Liu, Marc Loren Williams, Richard F. Andrews
  • Patent number: 9055059
    Abstract: A method of combining digital certificates at a prescheduled time is provided. The method includes receiving, by a processor, data from a first certificate and data from a second certificate and determining a certificate combination date. The certificate combination date directs a combining of the first certificate and the second certificate to form a combined certificate. The method further includes detecting the occurrence of the certificate combination date and combining the first certificate and the second certificate to form the combined certificate in response to detecting the occurrence of the certificate combination date.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: June 9, 2015
    Assignee: Symantec Corporation
    Inventors: Kokil Bhalerao, Quentin Liu, Marc Williams, Richard F. Andrews
  • Publication number: 20150100778
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, consumes the new OCSP responses using the cache keys.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 9, 2015
    Applicant: Symantec Corporation
    Inventors: Richard F. ANDREWS, Quentin LIU
  • Publication number: 20150100779
    Abstract: Techniques are disclosed for accelerating online certificate status protocol (OCSP) response distribution to relying parties using a content delivery network (CDN). A certificate authority generates updated OCSP responses for OCSP responses cached in the CDN that are about to expire. In addition, the certificate authority pre-generates cache keys in place of CDNs generating the keys. The certificate authority sends the OCSP responses and the cache keys in one transaction, and the CDN, in turn, serves requests for the OCSP responses using the cache keys. For new certificates, a private CDN is pre-populated with an OCSP response for a certificate concurrent with that certificate being issued. Doing so effectively uses the PCDN as an origin server for OCSP responses, reducing CA infrastructure needs.
    Type: Application
    Filed: December 19, 2013
    Publication date: April 9, 2015
    Applicant: Symantec Corporation
    Inventors: HARI VELADANDA, NING CHAI, Richard F. ANDREWS, Quentin LIU