Patents by Inventor David Earl Marshall

David Earl Marshall 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: 6314437
    Abstract: A method and apparatus are provided that enhance file system calls to a file system structure of an operating system. In particular, file system calls can be enhanced to provide real-time secure file deletion on an ongoing basis. A file system call that is intended to perform a function with respect to data stored on a storage device is intercepted. It is then determined whether the file system call is of a type that should be processed. If not, the original file system call is passed on through the file system. If the file system call should be processed, supplemental processing is performed to enhance the original file system call and the file system call is transparently returned to the calling system application. In embodiment, real-time secure file deletion is implemented using a vendor supplied driver (VSD) executing within the installable file system (IFS) of WINDOWS 95. Further, a method and system are disclosed for real-time secure data deletion in a system having an NTFS file system.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: November 6, 2001
    Assignee: Infraworks Corporation
    Inventors: Robert Phillip Starek, George Friedman, David Earl Marshall, Jason Lee Chambers, Michael J. Moorman, Terry S. Newgard
  • Patent number: 6212600
    Abstract: A method and apparatus are disclosed for sanitization of a fixed storage device interfaced to a computer system. The computer system is booted from a removable storage device that holds a bootable disk operating system and program code that is executed within the disk operating system. The fixed storage device is detected. The writeable space of the fixed storage device is then overwritten with a plurality of overwrite layers. Further, a report can be printed listing information about the sanitization process contemporaneously upon the completion of sanitization. In one embodiment, sanitizing is accomplished using a plurality of patterns, each layer having an associated pattern, to ensure that data can not be recovered even by destructive analysis.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: April 3, 2001
    Assignee: Infraworks Corporation
    Inventors: George Friedman, David Earl Marshall, Robert Phillip Starek, Jay R. Nelson
  • Patent number: 6070174
    Abstract: A method and apparatus are provided that enhance file system calls to a file system structure of an operating system. In particular, file system calls can be enhanced to provide real-time secure file deletion on an ongoing basis. A file system call that is intended to perform a function with respect to data stored on a storage device is intercepted. It is then determined whether the file system call is of a type that should be processed. If not, the original file system call is passed on through the file system. If the file system call should be processed, supplemental processing is performed to enhance the original file system call and the file system call is transparently returned to the calling system application. In embodiment, real-time secure file deletion is implemented using a vendor supplied driver (VSD) executing within the installable file system (IFS) of WINDOWS 95. Further, a method and system are disclosed for real-time secure data deletion in a system having an NTFS file system.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: May 30, 2000
    Assignee: Infraworks Corporation
    Inventors: Robert Phillip Starek, George Friedman, David Earl Marshall, Jason Lee Chambers, Michael J. Moorman, Terry S. Newgard
  • Patent number: 5991778
    Abstract: A method and apparatus are provided that enhance file system calls to a file system structure of an operating system. In particular, file system calls can be enhanced to provide real-time secure file deletion on an ongoing basis. A file system call that is intended to perform a function with respect to data stored on a storage device is intercepted. It is then determined whether the file system call is of a type that should be processed. If not, the original file system call is passed on through the file system. If the file system call should be processed, supplemental processing is performed to enhance the original file system call and the file system call is transparently returned to the calling system application. In embodiment, real-time secure file deletion is implemented using a vendor supplied driver (VSD) executing within the installable file system (IFS) of WINDOWS 95.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: November 23, 1999
    Assignee: Stratfor Systems, Inc.
    Inventors: Robert Phillip Starek, George Friedman, David Earl Marshall, Jason Lee Chambers