Patents by Inventor Chieh-Hao Yang
Chieh-Hao Yang 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: 10402313Abstract: In order to write data to a storage system accessible with a first and second file system, a manager receives a data write request associated with a file. The manager determines if a function supported by the second file system is needed to complete the write request. If so, the file is opened and extended with the first file system. The file is then opened and written to by the second file system. The file is truncated by the first file system, and closed by both file systems. If the second file system function is not needed, the file is opened, written, and closed by the first file system. In order to read data from a storage system using a function supported by the second file system, the second file system's cached storage system index is updated, and then the file is opened, read, and closed by the second file system.Type: GrantFiled: April 15, 2013Date of Patent: September 3, 2019Assignee: SanDisk Technologies LLCInventors: Junzhi Wang, Alon Marcu, Ori Stern, Susan A. Cannon, Xian Jun Liu, Chieh-Hao Yang, Po Yuan
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Patent number: 8621601Abstract: A set of code for a peripheral device is installed on a host device. The set of code is used to control access to the peripheral device from the host device. The set of code also contains one or more subsets of code that can be used by software entities on the host device for access to the peripheral device. A software entity on a host device must be successfully authenticated with the set of code installed on the host device. Once the software entity is successfully authenticated, the set of code will provide access to the one or more subsets of code specific to the software entity. The one or more subsets of code can be used by the software entity to access the peripheral device.Type: GrantFiled: May 21, 2008Date of Patent: December 31, 2013Assignee: SanDisk Technologies Inc.Inventors: Mei Yan, Chieh-Hao Yang, Bahman Quwami, Farshid Sabet-Sharghi, Patricia Dwyer, Po Yuan
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Publication number: 20130238844Abstract: In order to write data to a storage system accessible with a first and second file system, a manager receives a data write request associated with a file. The manager determines if a function supported by the second file system is needed to complete the write request. If so, the file is opened and extended with the first file system. The file is then opened and written to by the second file system. The file is truncated by the first file system, and closed by both file systems. If the second file system function is not needed, the file is opened, written, and closed by the first file system. In order to read data from a storage system using a function supported by the second file system, the second file system's cached storage system index is updated, then the file is opened, read, and closed by the second file system.Type: ApplicationFiled: April 15, 2013Publication date: September 12, 2013Inventors: Junzhi Wang, Alon Marcu, Ori Stern, Susan A. Cannon, Xian Jun Liu, Chieh-Hao Yang, Po Yuan
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Patent number: 8443207Abstract: A method of accessing content includes installing a file system filter for a secure removable memory device on a host device. A challenge is sent from the file system filter to a software entity on the host device, and a software entity response is received at the file system filter in response to the challenge. A file system filter response is calculated at the file system filter using the challenge, and access to first content on the secure removable memory device is provided if the software entity response matches the file system filter response.Type: GrantFiled: March 18, 2010Date of Patent: May 14, 2013Assignee: Sandisk Technologies Inc.Inventors: Mei Yan, Chieh-Hao Yang, Junzhi Wang, Paul McAvoy, Bahman Qawami, Farshid Sabet-Sharghi, Patricia Dwyer, Po Yuan
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Patent number: 8423592Abstract: In order to write data to a storage system accessible with a first and second file system, a manager receives a data write request associated with a file. The manager determines if a function supported by the second file system is needed to complete the write request. If so, the file is opened and extended with the first file system. The file is then opened and written to by the second file system. The file is truncated by the first file system, and closed by both file systems. If the second file system function is not needed, the file is opened, written, and closed by the first file system. In order to read data from a storage system using a function supported by the second file system, the second file system's cached storage system index is updated, and then the file is opened, read, and closed by the second file system.Type: GrantFiled: April 11, 2008Date of Patent: April 16, 2013Assignee: SanDisk Technologies Inc.Inventors: Junzhi Wang, Alon Marcu, Ori Stern, Susan A. Cannon, Xian Jun Liu, Chieh-Hao Yang, Po Yuan
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Patent number: 8171310Abstract: A software entity on a host device attempting to access protected content in a secure memory device must be authenticated using a challenge/response authentication mechanism before the secure file system can be accessed. A file system filter determines whether requested content is protected. If the content is protected, the file system filter provides a challenge to the software entity and generates a file system filter response using the same challenge. The software entity must then send a software entity response using the challenge to the file system filter. If the file system filter determines that the software entity response matches the file system filter response, the software entity is allowed to access the protected content through a secure file system installed on the host device for the memory device.Type: GrantFiled: December 24, 2007Date of Patent: May 1, 2012Assignee: SanDisk Technologies Inc.Inventors: Mei Yan, Chieh-Hao Yang, Junzhi Wang, Paul McAvoy, Bahman Quwami, Farshid Sabet-Sharghi, Patricia Dwyer, Po Yuan
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Patent number: 8069298Abstract: Methods of storing and accessing data using a header portion of a file are disclosed. In an embodiment, a method of storing content in a non-volatile memory is disclosed. The method includes reading a content file including media content and including a trailer, storing information related to the trailer together with secure data in a header portion of a file, and storing the file to a storage element of the non-volatile memory or a memory area of a host device coupled to the non-volatile memory device.Type: GrantFiled: June 29, 2007Date of Patent: November 29, 2011Assignee: SanDisk Technologies Inc.Inventors: Robert C. Chang, Po Yuan, Bahman Qawami, Farshid Sabet-sharghi, Junzhi Wang, Xian Jun Liu, Chieh-Hao Yang, June Li, Mei Yan, Fabrice Jogand-Coulomb
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Patent number: 7917697Abstract: A portable flash memory storage device such as a memory card can configure a host device upon insertion. The configuration may specify applications or other sequences of operations to be executed by the host upon insertion of the card. Files on the card may be associated with an appropriate application and then automatically opened with the appropriate application. A secure configuration may override a more freely modifiable configuration in certain embodiments.Type: GrantFiled: June 27, 2007Date of Patent: March 29, 2011Assignee: SanDisk CorporationInventors: Paul McAvoy, Fabrice Jogand-Coulomb, Pascal Caillon, Benjamin Vigier, Chieh-Hao Yang
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Patent number: 7861037Abstract: A portable flash memory storage device such as a memory card can configure a host device upon insertion. The configuration may specify applications or other sequences of operations to be executed by the host upon insertion of the card. Files on the card may be associated with an appropriate application and then automatically opened with the appropriate application. A secure configuration may override a more freely modifiable configuration in certain embodiments.Type: GrantFiled: June 27, 2007Date of Patent: December 28, 2010Assignee: SanDisk CorporationInventors: Paul McAvoy, Fabrice Jogand-Coulomb, Pascal Caillon, Benjamin Vigier, Chieh-Hao Yang
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Publication number: 20100191962Abstract: A method of accessing content includes installing a file system filter for a secure removable memory device on a host device. A challenge is sent from the file system filter to a software entity on the host device, and a software entity response is received at the file system filter in response to the challenge. A file system filter response is calculated at the file system filter using the challenge, and access to first content on the secure removable memory device is provided if the software entity response matches the file system filter response.Type: ApplicationFiled: March 18, 2010Publication date: July 29, 2010Applicant: SANDISK CORPORATIONInventors: Mei Yan, Chieh-Hao Yang, Junzhi Wang, Paul McAvoy, Bahman Qawami, Farshid Sabet-Sharghi, Patricia Dwyer, Po Yuan
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Publication number: 20090293118Abstract: A set of code for a peripheral device is installed on a host device. The set of code is used to control access to the peripheral device from the host device. The set of code also contains one or more subsets of code that can be used by software entities on the host device for access to the peripheral device. A software entity on a host device must be successfully authenticated with the set of code installed on the host device. Once the software entity is successfully authenticated, the set of code will provide access to the one or more subsets of code specific to the software entity. The one or more subsets of code can be used by the software entity to access the peripheral device.Type: ApplicationFiled: May 21, 2008Publication date: November 26, 2009Inventors: Mei Yan, Chieh-Hao Yang, Bahman Qawami, Farshid Sabet-Sharghi, Patricia Dwyer, Po Yuan
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Publication number: 20090293117Abstract: A set of code for a peripheral device is installed on a host device. The set of code is used to control access to the peripheral device from the host device. The set of code also contains one or more subsets of code that can be used by software entities on the host device for access to the peripheral device. A software entity on a host device must be successfully authenticated with the set of code installed on the host device. Once the software entity is successfully authenticated, the set of code will provide access to the one or more subsets of code specific to the software entity. The one or more subsets of code can be used by the software entity to access the peripheral device.Type: ApplicationFiled: May 21, 2008Publication date: November 26, 2009Inventors: Mei Yan, Chieh-Hao Yang, Bahman Quwami, Farshid Sabet-Sharghi, Patricia Dwyer, Po Yuan
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Publication number: 20090259798Abstract: In order to write data to a storage system accessible with a first and second file system, a manager receives a data write request associated with a file. The manager determines if a function supported by the second file system is needed to complete the write request. If so, the file is opened and extended with the first file system. The file is then opened and written to by the second file system. The file is truncated by the first file system, and closed by both file systems. If the second file system function is not needed, the file is opened, written, and closed by the first file system. In order to read data from a storage system using a function supported by the second file system, the second file system's cached storage system index is updated, then the file is opened, read, and closed by the second file system.Type: ApplicationFiled: April 11, 2008Publication date: October 15, 2009Inventors: Junzhi Wang, Alon Marcu, Ori Stern, Susan A. Cannon, Xian Jun Liu, Chieh-Hao Yang, Po Yuan
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Publication number: 20090164779Abstract: A software entity on a host device attempting to access protected content in a secure memory device must be authenticated using a challenge/response authentication mechanism before the secure file system can be accessed. A file system filter determines whether requested content is protected. If the content is protected, the file system filter provides a challenge to the software entity and generates a file system filter response using the same challenge. The software entity must then send a software entity response using the challenge to the file system filter. If the file system filter determines that the software entity response matches the file system filter response, the software entity is allowed to access the protected content through a secure file system installed on the host device for the memory device.Type: ApplicationFiled: December 24, 2007Publication date: June 25, 2009Inventors: Mei Yan, Chieh-Hao Yang, Junzhi Wang, Paul McAvoy, Bahman Qawami, Farshid Sabet-Sharghi, Patricia Dwyer, Po Yuan
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Publication number: 20090006721Abstract: A portable flash memory storage device such as a memory card can configure a host device upon insertion. The configuration may specify applications or other sequences of operations to be executed by the host upon insertion of the card. Files on the card may be associated with an appropriate application and then automatically opened with the appropriate application. A secure configuration may override a more freely modifiable configuration in certain embodiments.Type: ApplicationFiled: June 27, 2007Publication date: January 1, 2009Inventors: Paul McAvoy, Fabrice Jogand-Coulomb, Pascal Caillon, Benjamin Vigier, Chieh-Hao Yang
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Publication number: 20090006796Abstract: A computer readable media storing operational instructions is disclosed. The instructions includes at least one instruction to store data of an encrypted computer readable file that includes a header portion and associated content data into a storage area of a non-volatile memory. The storage area includes a secure memory area to store data from the header portion including at least one encryption ID. The storage area further includes a memory area to store the content data. The header portion further includes trailer data derived from a portion of the content data. The instructions also include at least one instruction to provide data read access to the header portion and to the content data with respect to a host device.Type: ApplicationFiled: June 29, 2007Publication date: January 1, 2009Applicant: SanDisk CorporationInventors: Robert C. Chang, Po Yuan, Bahman Qawami, Farshid Sabet-sharghi, Junzhi Wang, Xian Jun Liu, Chieh-Hao Yang, June Li, Mei Yan
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Publication number: 20090006722Abstract: A portable flash memory storage device such as a memory card can configure a host device upon insertion. The configuration may specify applications or other sequences of operations to be executed by the host upon insertion of the card. Files on the card may be associated with an appropriate application and then automatically opened with the appropriate application. A secure configuration may override a more freely modifiable configuration in certain embodiments.Type: ApplicationFiled: June 27, 2007Publication date: January 1, 2009Inventors: Paul McAvoy, Fabrice Jogand-Coulomb, Pascal Caillon, Benjamin Vigier, Chieh-Hao Yang
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Publication number: 20090006724Abstract: Methods of storing and accessing data using a header portion of a file are disclosed. In an embodiment, a method of storing content in a non-volatile memory is disclosed. The method includes reading a content file including media content and including a trailer, storing information related to the trailer together with secure data in a header portion of a file, and storing the file to a storage element of the non-volatile memory or a memory area of a host device coupled to the non-volatile memory device.Type: ApplicationFiled: June 29, 2007Publication date: January 1, 2009Applicant: SanDisk CorporationInventors: Robert C. Chang, Po Yuan, Bahman Qawami, Farshid Sabet-sharghi, Junzhi Wang, Xian Jun Liu, Chieh-Hao Yang, June Li, Mei Yan