Dao-Chen Zheng

age ~61

from Cupertino, CA

Dao-Chen Zheng Phones & Addresses

  • Cupertino, CA

Us Patents

  • Method Of Treating Whitespace During Virus Detection

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  • US Patent:
    62302884, May 8, 2001
  • Filed:
    Oct 29, 1998
  • Appl. No.:
    9/181880
  • Inventors:
    Chengi Jimmy Kuo - Torrance CA
    Jivko Koltchev - Campbell CA
    Dao-Chen Zheng - Cupertino CA
    Joseph Peter - Hillsboro OR
  • Assignee:
    Network Associates, Inc. - Santa Clara CA
  • International Classification:
    H02H 305
  • US Classification:
    714 38
  • Abstract:
    A method is provided for detecting computer viruses that infect text-based files. In accordance with a preferred embodiment, a collection of virus signatures reflecting sequences of characters or instructions known to be found in such viruses is maintained on a computer system. A virus detection program is also maintained for the purpose of comparing the contents of computer files to the virus signatures. Upon execution of the virus detection program, whitespace within text-based files is transformed such that each sequence of whitespace characters is replaced by a single whitespace character. Virus signatures of viruses known to infect text files are similarly transformed. A transformed text-based file is then searched for at least one of said virus signatures. The user is alerted to a possible virus infection if any of the virus signatures are found in a file. In another preferred embodiment, an additional collection of at least one virus signature containing sequences of characters or instructions known to be found in viruses that infect executable computer files is maintained on the computer system.
  • Key-Value Storage For Url Categorization

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  • US Patent:
    20230108362, Apr 6, 2023
  • Filed:
    Nov 30, 2022
  • Appl. No.:
    18/072511
  • Inventors:
    - Santa Clara CA, US
    Dao-Chen Zheng - Cupertino CA, US
  • International Classification:
    G06F 16/901
    G06F 16/955
    H04L 9/40
    G06F 16/906
  • Abstract:
    A URL and a categorization associated with the URL are received. The received URL comprises a hostname portion and a path portion. The hostname portion of the received URL comprises a plurality of segments separated by one or more delimiters. A key associated with the received URL is determined. An operation is performed on a database using the determined key. Examples of such operations include inserting the categorization into the database, changing a value associated with the key in the database, removing a key-value pair from the database, and querying the database.
  • Key-Value Storage For Url Categorization

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  • US Patent:
    20210049207, Feb 18, 2021
  • Filed:
    Aug 16, 2019
  • Appl. No.:
    16/543147
  • Inventors:
    - Santa Clara CA, US
    Dao-Chen Zheng - Cupertino CA, US
  • International Classification:
    G06F 16/901
    G06F 16/955
    G06F 16/906
    H04L 29/06
  • Abstract:
    A URL and a categorization associated with the URL are received. A key associated with the received URL is determined. An operation is performed on a database using the determined key. Examples of such operations include inserting the categorization into the database, changing a value associated with the key in the database, removing a key-value pair from the database, and querying the database.

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