Patents by Inventor Karina Si-Woon Chan

Karina Si-Woon Chan 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).

  • ENABLING USING EXTERNAL TENANT MASTER KEYS
    Publication number: 20230412368
    Abstract: The present application discloses a method, system, and computer system for managing data using keys. The method includes receiving a request to access data stored within a tenant database associated with a tenant, wherein the data is encrypted based at least in part on a tenant service encryption key (TSEK) corresponding to the tenant database, determining a wrapper key used in connection with encrypting the TSEK based at least in part on a TSEK metadata stored in association with the TSEK, determining a top-level key used in connection with encrypting the wrapper key based at least in part on wrapper key metadata stored in association with the encrypted version of the wrapper key, obtaining the data stored within the tenant database, comprising decrypting at least part of the data based at least in part on (i) the TSEK, (ii) the wrapper key, and (iii) the top-level key, and providing the data in response to the request. The TSEK metadata is stored in the tenant database.
    Type: Application
    Filed: September 5, 2023
    Publication date: December 21, 2023
    Inventors: Miguel Leonardo Chinchilla Cartagena, Karina Si-Woon Chan, Aswani Kaushik Chimthapalli, Michael Clarke, Amol Anant Deshmukh, Subha Gopalakrishnan, Bjorn Brook Hamel, Louis James LaTouche, Atlee Glen Lyden, Marcus Anthony Sanchez, Jasmine Teresa Schladen, Devaki Ajinkya Tarkunde, Harrison Yu
  • Enabling using external tenant master keys
    Patent number: 11799633
    Abstract: The present application discloses a method, system, and computer system for managing data using keys. The method includes receiving a request to access data stored within a tenant database associated with a tenant, wherein the data is encrypted based at least in part on a tenant service encryption key (TSEK) corresponding to the tenant database, determining a wrapper key used in connection with encrypting the TSEK based at least in part on a TSEK metadata stored in association with the TSEK, determining a top-level key used in connection with encrypting the wrapper key based at least in part on wrapper key metadata stored in association with the encrypted version of the wrapper key, obtaining the data stored within the tenant database, comprising decrypting at least part of the data based at least in part on (i) the TSEK, (ii) the wrapper key, and (iii) the top-level key, and providing the data in response to the request. The TSEK metadata is stored in the tenant database.
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: October 24, 2023
    Assignee: Workday, Inc.
    Inventors: Miguel Leonardo Chinchilla Cartagena, Karina Si-Woon Chan, Aswani Kaushik Chimthapalli, Michael Clarke, Amol Anant Deshmukh, Subha Gopalakrishnan, Bjorn Brook Hamel, Louis James LaTouche, Atlee Glen Lyden, Marcus Anthony Sanchez, Jasmine Teresa Schladen, Devaki Ajinkya Tarkunde, Harrison Yu