Patents by Inventor Wen Hao Chang

Wen Hao Chang 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: 8190905
    Abstract: A system and method for authorizing administrative operations in a computer is provided. The computer initiates the split knowledge protocol upon an attempt by an administrator to invoke the operations. The administrator identifies a predetermined number of entities designated to authorize the operation. The computer creates a bit sequence and splits the bit sequence into a number of segments equal to the predetermined number of entities. Each entity thereafter decrypts a respective element to essentially authorize invocation of the operations. In response, the computer processes the decrypted segments to re-create the bit sequence. As an added level of security, the computer coma) pares the re-created bit sequence with the originally created sequence and, if they match, performs the operations.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: May 29, 2012
    Assignee: NetApp, Inc.
    Inventors: Lawrence Wen-Hao Chang, Ananthan Subramanian
  • Patent number: 8116455
    Abstract: A system and method provides for secure initialization and booting of a security appliance. The security appliance cooperates with a “smart” system card to provide cryptographic information needed to boot the security appliance in accordance with a secure boot procedure. The initialization procedure commences once the security appliance detects the presence of the smart card. The smart card and an encryption processor perform an authentication and key exchange procedure to establish a secure communication channel between them. The system card then loads a twice wrapped master key from a configuration database and decrypts the master key using a key associated with the system card. The wrapped master key is then forwarded via the secure communication channel to the encryption processor, which decrypts the wrapped key using a key associated therewith and enters an operating state using the decrypted master key.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: February 14, 2012
    Assignee: NetApp, Inc.
    Inventors: Robert Jan Sussland, Ananthan Subramanian, Lawrence Wen-Hao Chang
  • Patent number: 8042155
    Abstract: A system and method which generates a single use password based on a challenge/response protocol. A box manager module executing within a security appliance identifies a public key (P) and salt value (S) associated with an administrator's smart card and generates a random nonce (N). The box manager transmits a challenge comprising the following elements: <SHA1(N), BM_ID, P[N, BM_ID], S>. Upon receiving the challenge, the administration card decrypts P[N, BM_ID] using the private key contained within the card and computes SHA1(N). The administration card then compares its computed values with the received values from the box manager. If the values match, then to the administration card returns a response comprising the following elements: HMAC_N[user, SHA1 (password, S)], where HMAC_N represents the SHA1 keyed hash message authentication check of the response elements using the nonce N as the key.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: October 18, 2011
    Assignee: NetApp, Inc.
    Inventors: Lawrence Wen-Hao Chang, Ananthan Subramanian
  • Publication number: 20110157015
    Abstract: A dongle includes: a receiver, for receiving a control signal which is not generated from a multi-touch panel; a processing unit, coupled to the receiver, for generating a multi-touch output signal corresponding to a multi-touch event according to the control signal; and a data port, coupled to the processing unit, for outputting the multi-touch output signal.
    Type: Application
    Filed: April 9, 2010
    Publication date: June 30, 2011
    Inventors: Zhou Ye, Shun-Nan Liou, Ching-Lin Hsieh, Wen-Hao Chang
  • Publication number: 20110157231
    Abstract: An electronic control apparatus including motion sensors is integrated in a portable electronic device to responsively control a media content stored in the portable electronic device, in response to motion sensor signals to flip, zoom, displace images/pages of the media content displayed on a display field of a display thereof. Accordingly, a responsive control method includes the steps of: presetting a first threshold angle; sensing an first rotation angle of the portable electronic device to send out a first rotation sensing signal as a rotation of a yaw, pitch or roll of a portable electronic device detected by a sensing module including motion sensors; and receiving the first rotation sensing signal to calculate and determine whether the first rotation angle is greater than the first threshold angle to responsively control a media content stored in an electronic control apparatus be flipped, zoomed or displaced when the first rotation angle is greater than the first threshold angle.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 30, 2011
    Inventors: ZHOU YE, SHAN-NAN LIOU, YING-KO LU, WEN-HAO CHANG, TIGRAN TADEVOSYAN
  • Patent number: 7958356
    Abstract: A system and method securely establishes a shared secret among nodes of a security appliance. The shared secret is established by distributing private keys among the nodes in accordance with a node ring protocol that uses a predetermined encryption algorithm to generate messages containing the keys. Briefly, each node is initially notified as to the number of nodes participating in the shared secret establishment. Each node generates a public-private key-pair, as well as a first message that includes the generated public key and an indication of the source of the generated public key (hereinafter “source generated public key”). The node then sends the first message to an adjacent node of the appliance. Upon receiving the first message, each node extracts the source generated public key from the message and stores the extracted information into a data structure of “partner” public keys.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: June 7, 2011
    Assignee: NetApp, Inc.
    Inventors: Ananthan Subramanian, Robert Jan Sussland, Lawrence Wen-Hao Chang
  • Publication number: 20090055646
    Abstract: An apparatus and method for managing the distribution and expansion of public keys held by a group or array of systems in white lists. The addition of a new system to the array entails a manual input to authorize the introduction of the new system to one trusted system in the array. After the introduction the new system is trusted by the one member and the white list of the one member is loaded into the white list of the new system. The new system then requests joining each of the other systems in the array. For each system in the array asked by the new system, the systems in the array ask if any other systems in the array already trust the new member. In response, a system of the array that trusts the new system responds by sending its white list (containing the public key of the new system) to the requesting system. Eventually the public key of the new system is in the white lists of all the systems in the array.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 26, 2009
    Inventors: Robert J. Sussland, Joshua Oran Silberman, Ananthan Subramanian, Lawrence Wen-Hao Chang
  • Publication number: 20070206162
    Abstract: An optical projection apparatus comprising an illumination system, a light valve, an imaging system, a power supply circuit and a generator are provided. The illumination system with a color wheel is providing a light beam. The light valve is disposed on the transmitting path of the light beam for transforming the light beam into an image light beam. The imaging system is also disposed on the transmitting path of the image light beam. The power supply circuit is electrically connected to the illumination system and the light valve is connecting with an external power supply. The generator is electrically connected to the power supply circuit. The color wheel connected to the generator drives the generator to generate electric power. The electric power is transmitted to the power supply circuit and powers the optical projection apparatus. Consequently, overall power consumption of the optical projection apparatus is reduced.
    Type: Application
    Filed: December 5, 2006
    Publication date: September 6, 2007
    Applicant: CORETRONIC CORPORATION
    Inventors: Wen-Hao Chang, Wei-Jen Cheng, Chun-Li Chen
  • Publication number: 20070158530
    Abstract: An electric screen for a projector is provided. The electric screen utilizes a photo-electric conversion apparatus to convert received photon energy into electric energy and stores the electric energy in a storage battery. A motor is driven by the electric energy stored in a storage battery to extend or retract a screen. The electric screen further has a switch, the electric screen cooperates with the projector more efficiently.
    Type: Application
    Filed: November 27, 2006
    Publication date: July 12, 2007
    Inventors: Hung-Chieh Huang, Wen-Hao Chang, Wei-Jen Cheng
  • Publication number: 20060009731
    Abstract: An electric energy auxiliary device of transdermal drug delivery patch is provided which includes an upper electrode, a lower electrode, and a drug storage area between two electrodes, generating a kinetic energy in the pharmaceutical compound in the drug storage area toward the skin by a electric field between two electrodes. For the pharmaceutical compound with the same polarity, the pharmaceutical compound is pushed by the electric energy interacted with polar the pharmaceutical compound so as to deliver the drug the human body. The lower electrode generates an ion channel with electroporation on the surface of skin. By using the change of electric field on the surface of skin, a temporary ion channel is generated in the cells where the pharmaceutical compound enters the systemic circulation of human body via skin. This temporary ion channel allows large compound to pass into the skin of human body.
    Type: Application
    Filed: December 16, 2004
    Publication date: January 12, 2006
    Inventors: Tsai-Fu Wu, Sheng-Yu Tseng, Wen-Hao Chang
  • Patent number: 6710852
    Abstract: A method of wafer exposure with correction feedback. The method includes the steps of using a first group of parameters to expose the first wafer to transfer a pattern of a first layer, using a second group of parameters to perform overlay alignment of the pattern of the first layer with a pattern of a second layer for the first wafer, measuring the first wafer to obtain a first and second correction respectively for the first and second parameter groups correcting the first group with the first correction and using the corrected parameters to expose the second wafer to transfer the pattern of the first layer, and correcting the second group with the second correction and using the corrected parameters to perform overlay alignment of the pattern of the first layer with the pattern of the second layer for the second wafer.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: March 23, 2004
    Assignee: Nanya Technology Corporation
    Inventors: Cheng Ming Chen, Wen Hao Chang, Yun-Kuei Chiu
  • Publication number: 20030191644
    Abstract: A vocalizing input device includes a processor device for coupling to various computer facilities, one or more input devices for entering sounds and voices into the processor device, one or more devices for entering information corresponding to the sounds and voices into the processor device, and one or more memories for storing the sounds and voices and the information corresponding to the sounds and voices. The processor device may compare the newly entered and the stored sounds and voices, and then may provide the corresponding information to the computer facilities.
    Type: Application
    Filed: April 4, 2002
    Publication date: October 9, 2003
    Inventor: Wen Hao Chang
  • Publication number: 20030123034
    Abstract: A method of wafer exposure with correction feedback. The method comprises the steps of providing a first and second wafer, using a first group of parameters to expose the first wafer to transfer a pattern of a first layer to the first wafer, using a second group of parameters to perform overlay alignment of the pattern of the first layer with a pattern of a second layer for the first wafer, performing measurement of the first wafer to obtain a first and second correction respectively for the first and second group of the parameters, correcting the first group of the parameters with the first correction and using the first group of the corrected parameters to expose the second wafer to transfer the pattern of the first layer to the second wafer, and correcting the second group of the parameters with the second correction and using the second group of the corrected parameters to perform overlay alignment of the pattern of the first layer with the pattern of the second layer for the second wafer.
    Type: Application
    Filed: August 23, 2002
    Publication date: July 3, 2003
    Applicant: NANYA TECHNOLOGY CORPORATION
    Inventors: Cheng Ming Chen, Wen Hao Chang, Yun-Kuei Chiu