US20060069819A1 - Universal serial bus device - Google Patents

Universal serial bus device Download PDF

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Publication number
US20060069819A1
US20060069819A1 US10/951,547 US95154704A US2006069819A1 US 20060069819 A1 US20060069819 A1 US 20060069819A1 US 95154704 A US95154704 A US 95154704A US 2006069819 A1 US2006069819 A1 US 2006069819A1
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United States
Prior art keywords
credential
usb
computer readable
flash drive
readable medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/951,547
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English (en)
Inventor
Christopher Corbett
David McLauchlan
Mohammad Shakeri
Scott Manchester
David Campbell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Microsoft Technology Licensing LLC
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Microsoft Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Microsoft Corp filed Critical Microsoft Corp
Priority to US10/951,547 priority Critical patent/US20060069819A1/en
Priority to US10/975,666 priority patent/US7765341B2/en
Assigned to MICROSOFT CORPORATION reassignment MICROSOFT CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MCLAUCHLAN, DAVID, MANCHESTER, SCOTT A., CORBETT, CHRISTOPHER J., SHAKERI, MOHAMMAD, CAMPBELL, DAVID T.
Priority to US11/192,291 priority patent/US7747797B2/en
Priority to EP05108923A priority patent/EP1640846A2/en
Priority to CNA2005101283850A priority patent/CN1818888A/zh
Priority to KR1020050090322A priority patent/KR20060051723A/ko
Priority to JP2005282028A priority patent/JP2006099776A/ja
Publication of US20060069819A1 publication Critical patent/US20060069819A1/en
Assigned to MICROSOFT TECHNOLOGY LICENSING, LLC reassignment MICROSOFT TECHNOLOGY LICENSING, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MICROSOFT CORPORATION
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
    • G06F21/79—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in semiconductor storage media, e.g. directly-addressable memories
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units

Definitions

  • the present application relates to a peripheral device, and more specifically, to a universal serial bus device.
  • USB Universal Serial Bus
  • a Universal Serial Bus (“USB”) is an external bus that supports plug and play installation. Using a USB port of a computer system, a user may connect and disconnect devices without shutting down or restarting the computer.
  • a single USB port may connect multiple peripheral devices, including speakers, telephones, CD-ROM drives, joysticks, tape drives, keyboards, scanners, memory drives, and cameras, such as through daisy chaining the peripheral devices into one port of the computer system.
  • USB flash drives and other USB compatible devices are described further in the Universal Serial Bus Specification available at http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf.
  • Flash memory is a type of nonvolatile computer readable medium, similar to EEPROM memory in function, but may be erased in blocks. Because of its block-oriented nature, flash memory is typically used as a supplement to or replacement for hard disks in portable computers. In this context, flash memory is typically built into the unit, available as a PC Card that can be plugged into a PCMCIA slot, or available as a USB device compatible with a USB port.
  • USB flash drives are typically used to store data in a nonvolatile computer readable medium when it is physically connected to a USB port of a computer system. Since a USB flash drive is portable, e.g., removable from the computer system USB port, a USB flash drive may transfer data to another computer system when it is attached to the USB port of another computer system. However, not all devices have a USB port. To transfer stored data to an external device not compatible with the USB protocol, the USB flash drive may include a transmitter capable of transmitting data from the USB flash drive directly to an external device.
  • USB flash drives may also include a computer readable medium partitioned into public and private partitions.
  • the public partition may be accessible through normal channels of access.
  • the private partition may be accessed only through authentication of a credential provided by the user or computer system. Only users or systems providing a valid credential may access data stored in the private partition.
  • the credential may be received by a decision component of the USB flash drive to authenticate the credential and allow access to the private partition.
  • USB devices generally rely on power derived through the physical connection of the USB connector to the USB port of a computer system. In this manner, USB devices rely on the USB port connection to provide power and function to the components within the USB device.
  • the USB device may include a power supply, independent of the USB connector, to provide power to one or more components of the USB device.
  • FIG. 1 is a schematic illustration of an example USB flash drive in one embodiment
  • FIG. 2 is a flow chart of an example method of transmitting data using the USB flash drive of FIG. 1 in one embodiment
  • FIG. 3 is a flow chart of an example method implementing credential authentication in one embodiment
  • FIG. 4 is a schematic illustration of an example USB flash drive in one embodiment
  • FIG. 5 is a schematic illustration of another example USB flash drive in one embodiment
  • FIG. 6 is a schematic illustration of an example USB device in one embodiment.
  • FIG. 7 is a schematic illustration of another example USB device in one embodiment.
  • FIG. 1 illustrates an example USB flash drive 100 .
  • the USB flash drive 100 may be connected to a host computer system 102 through a physical connection of the USB connector 106 of the flash drive 100 into the USB port 104 of the host computer system 102 .
  • the USB connector 106 may be any suitable USB connector including a Type A USB connector, a Type B USB connector, and a mini-USB connector.
  • the USB connector 106 may be in communication with a USB interface 108 of a controller 110 .
  • the USB flash drive 100 may include a nonvolatile computer readable medium 112 which may include one or more flash memories 114 , 116 , which may be controlled by the controller 110 through the nonvolatile computer readable medium interface 118 .
  • the controller 110 may also access appropriate firmware 120 such as an operating system to control the operation and function of the USB connector and the nonvolatile computer readable medium.
  • the controller 110 may be any suitable controller including a processor, a special purpose state device, or any other appropriate controller.
  • the flash drive 100 may include a transmitter 122 controlled by the controller 100 as shown in FIG. 1 .
  • the transmitter may be any suitable component for transmitting data from the computer readable medium 112 to an external device 150 .
  • the transmitter 122 may be substantially operable with the USB connector 106 , such as information may be transmitted by the transmitter while the USB connector is connected to the USB port of the host computer 102 .
  • the transmitter may transmit compressed data.
  • the data from the computer readable medium 112 may be stored in a compressed format and/or compressed by the controller, e.g., compressed by any suitable method to decrease the amount of memory and/or bandwidth.
  • Compressed data may be expanded by any suitable method to allow the data to be used and/or accessed for its intended purpose or function.
  • the transmitter may transmit a modulated data signal and/or may transmit the data wirelessly, e.g., without a direct physical connection between the USB flash drive and the external device 150 .
  • the transmitter may directly transmit data.
  • ‘directly transmitting’ means that the data is transmitted from the USB flash drive 100 to another device 150 without any intervening host computer system and without peripheral communication wires, e.g., wireless communications.
  • a suitable direct transmitter 122 may include a USB port suitable for accepting a USB connector of another device. In this manner, data may be transferred directly from the USB flash drive to the external device, without any intervention by the host computer system 102 connected to the USB connector 106 of the flash drive 100 .
  • the transmitter 122 may send a modulated data signal with the data encoded onto the modulated data signal.
  • the transmitter may include a frequency transmitter such as an infrared transmitter similar to those used on small form computing devices including personal digital assistant computing devices and cellular telephones.
  • Other suitable frequency transmitters may support radio frequency, acoustic, ultraviolet, optical, and the like.
  • Other transmitter types may be suitable including magnetic field data transmitters and any other wireless media.
  • the transmission of the data may be governed by any appropriate protocol, such as the Infrared Data Association (IrDA) standards, BlueTooth protocols, radio frequency identification protocols, and the like.
  • IrDA Infrared Data Association
  • Communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
  • modulated data signal means a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal.
  • communication media includes wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared, and other wireless media. Combinations of any of the above should also be included within the scope of communication media.
  • Transfer of data from the nonvolatile memory to the external device 150 through the transmitter 122 may be initiated by any appropriate method or device.
  • the user may provide a transmission initiation indication through the host computer system to initiate transmission of data to an external device.
  • a client driver (not shown) of the host computer system 102 may provide a dialog, menu, displayed button, or other appropriate user interface or selector which allows a user to initiate transfer of data.
  • the host computer system may communicate the transmission initiation indication to the USB flash drive through the USB connection.
  • the transmitter may transmit data to the external device.
  • transfer of data through the transmitter 122 may be initiated through selection of one or more selectors 130 of the USB flash drive.
  • the USB flash drive 100 may include a transmission initiation selector 134 , such as a button, selector wheel, and the like.
  • the transmitter 122 may transmit all or a portion of the data stored in the computer readable medium 112 to the external device 150 .
  • connection of the external device to the transmitter may automatically initiate transmission. For example, if the transmitter is a USB port described above, connection of a USB connector into the USB port of the USB flash drive 100 may initiate transmission.
  • each device i.e., the USB flash drive and the external device
  • the USB flash drive 100 may include one or more selectors 130 , to indicate whether the USB flash drive is the ‘transmitter’ of data and/or the ‘receiver’ of data to/from the external device 150 .
  • a default device may be predetermined as the sender and/or receiver of data.
  • the device having the USB connector connected to the USB port of another device may be considered the ‘transmitter’ of data, and the device having the USB port connected to the USB connector may be considered the ‘receiver’ of data. It is to be appreciated that other suitable default settings and/or selectors may be appropriate.
  • any suitable method may be used to determine which portion of the data stored in the nonvolatile computer readable medium may be transmitted. For example, all of the data stored in the nonvolatile computer readable medium 112 may be transmitted upon activation of the transmission initiation selector.
  • the data portion to be transmitted may be predetermined or pre-set by the user and/or the manufacturer of the USB flash drive.
  • the user may indicate the selected portion of data to be transmitted which may be stored in a predetermined partition of the computer readable medium and/or the location for data to be transmitted may be determinable by the controller 110 .
  • the controller may send to the transmitter 122 the predetermined portion of data.
  • a host device 102 may be connected to the USB flash drive 100 through the physical USB connection, allowing a user to access and/or determine the data portions, such as files, documents, executables, memory partitions, and other components available on the computer readable medium 112 of the USB flash drive.
  • the host computer system may provide a user interface, such as a dialog, tabular display, and the like, allowing a user to select a particular data portion to be transmitted.
  • the USB flash drive may provide a user interface allowing a user to select a portion of data to be transmitted.
  • the USB flash drive 100 may include one or more selectors 130 allowing a user to select a data portion.
  • Each selector may be associated with a particular data component (e.g., file, executable, data portion, and the like) and/or may be associated with a particular memory partition.
  • the user may associate a particular data file with a data indicator 138 which may be a button, wheel selector, alpha-numeric keys, or any other suitable selector of the USB flash drive 100 .
  • the USB flash drive may include an alpha-numeric keypad, e.g., button ‘1’, button ‘2’, button ‘3’, and button ‘4’.
  • the user may associate selected files and/or memory partitions to particular alpha-numeric keys, e.g., file 1 may be associated with button ‘1’, file 2 may be associated with button ‘2’, memory partition 3 may be associated with button ‘3’, and the like.
  • a selected data portion may be associated with a particular series, combination, and/or timing of selector initiation. For example, a series selection of button ‘1’ and then button ‘2’ may be associated with a data portion.
  • a combination of substantially simultaneous activation of button ‘1’ and button ‘2’ may be associated with a data portion.
  • a timing sequence such as pressing button ‘1’ in a “shave and a haircut two bits” rhythm may be associated with another data portion.
  • a data indicator 138 may be associated with a plurality of data portions associated in a sequence. In this manner, sequential activations of the data indicator 138 may ‘scroll’ through the available data portions to indicate the selected data portion to be transmitted. More particularly, a single activation of the data indicator 138 may select a first data portion, a double activation of the data indicator in a predetermined amount of time may select a second data portion, and the like. Combinations of the above (series, combinations, timing, and the like) should be included within the scope of selecting a data indicator.
  • the user and/or flash drive manufacturer may partition the non-volatile memory into one or more data partitions. In this manner, all data stored in the partition may be transmitted if that particular data partition is selected. It is to be appreciated that any other suitable indication of the selected data portion may be appropriate.
  • a user may wish to transfer her wireless settings to another user wishing to use the wireless network.
  • the user may select her wireless setting data partition and activate the transmission initiation selector of the USB flash drive to transfer those settings to another user.
  • Example methods of transferring wireless setting data is further described in U.S. Application Nos. 60/534,795 filed Jan. 7, 2004; Ser. No. 10/807,095 filed Mar. 23, 2004; and Ser. No. 10/866,336 filed Mar. 23, 2004, all assigned to Microsoft. Corp. and incorporated by reference herein.
  • the user may associate a personal information data file with a particular data indicator of the USB flash drive.
  • the user may active the data indicator in an appropriate manner (e.g., sequence, combination, and/or timing) to select the personal information data file and then activate the transmission initiation selector to transmit the personal information, such as an Icard, to the external device.
  • the transmission initiation selector 134 and the data indicator selector 138 may be integrated into a single selector 136 as shown in FIG. 1 .
  • a user may indicate initiation of transmission of a first data portion with a first activation of a first data select/transmit selector 136 , and may indicate initiation of transmission of a second data portion with a second activation of a second data select/transmit selector 136 .
  • FIG. 2 One example method 200 of transmitting data from a USB flash device is illustrated in FIG. 2 with reference to the example USB flash drive of FIG. 1 .
  • data is stored 210 in the nonvolatile computer readable medium of the USB flash drive 100 shown in FIG. 1 .
  • the data portion to be transmitted may be selected 212 .
  • the user may select a data portion to transmit through a user interface of the host computer system 102 , through a data indicator 138 , and/or through one or more selectors 130 .
  • the data portion to be transmitted may be any portion or combination of a memory partition and/or file, executable, and the like.
  • the controller may compress 214 the selected data portion.
  • the controller and/or transmitter may encode 216 the data portion onto a modulated data signal.
  • the user may then initiate 218 transmission of the selected data portion, such as through a user interface of the host computer system and/or through a transmission initiation selector 134 of the USB flash drive 100 .
  • the transmitter may transmit 220 the data portion, and the external device may receive 222 the data portion.
  • the USB flash drive 100 may include a receiver 124 controlled by the controller 100 as shown in FIG. 1 .
  • the receiver may be any suitable component for receiving data from the external device 150 .
  • the receiver 124 may include a receiver of the same type as the transmitter, and may be integrated as a transceiver. Alternatively, the receiver may be of a different type than the transmitter 122 .
  • the receiver may receive compressed data.
  • the receiver may receive the transmitted data from the external device 150 in a compressed format e.g., compressed by any suitable method to decrease the amount of memory and/or bandwidth.
  • Compressed data may be expanded by the controller by any suitable method to allow the data to be used and/or accessed for its intended purpose or function.
  • the receiver may receive a modulated data signal and/or may receive the data wirelessly, e.g., without a direct physical connection between the USB flash drive and the external device 150 .
  • the receiver may directly receive data.
  • ‘directly receiving’ means that the data is received from an external device other than a host 102 computer system to the USB flash drive 100 without any intervening host computer system and without peripheral communication wires.
  • a suitable receiver 124 may include a USB port of the USB flash drive 100 suitable for accepting a USB connector of another device. In this manner, data may be transferred directly from the external device to the USB flash drive, without intervention by the host computer system 102 connected to the USB connector 106 of the flash drive 100 .
  • the receiver may wirelessly receive a modulated data signal with the data encoded onto the modulated data signal.
  • the wireless receiver may include an infrared receiver, a radio frequency receiver, an acoustic receiver, an ultraviolet frequency receiver, an optical frequency receiver, a magnetic field data receiver, and any other wireless media receiver.
  • the reception of the data may be governed by any appropriate protocol, such as Infrared Data Association (IrDA) standards, BlueTooth protocols, radio frequency identification protocols, and the like.
  • IrDA Infrared Data Association
  • the nonvolatile computer readable medium 112 may be partitioned into at least a first and second partition. In some cases, it may be suitable to protect information from public access, and as such, one or more partitions may be indicated as public and one or more other partitions may be indicated as private.
  • flash memory 114 may be partitioned into a public partition 160 and a private and protected partition 162 .
  • the public partition may be accessible as typical flash memory of a USB flash drive.
  • the private partition may be hidden, e.g., not exposed, and/or encrypted to protect the data stored in the private partition from unauthorized access. Accordingly, to access the data stored in the private partition, an authentic credential must be presented.
  • a credential may be any suitable combination of a password, fingerprint, radio frequency identifier, written signature, voice signature, cryptographic key, retina, facial features, physical key, and the like. The credential may be presented to the USB device through any suitable method.
  • the host computer 102 may present a user interface to the user through a display of the host computer.
  • the user may input a password through the keyboard of the host computer system, write a signature with a digital pen on a suitable tablet device, speak any word or a predetermined password into a microphone, and the like.
  • the host computer system 102 shown in FIG. 1 may automatically provide a previously stored credential if provided by the user to allow a user automatic access to the private partition when the USB flash drive 100 is connected to a pre-approved host computer system with a stored credential.
  • the user may present the credential through one or more selectors 130 of the USB flash drive 100 , shown in FIG. 1 . Similar to the various series, combinations, and/or timing of selectors discussed above with reference to data portion selection, a user may present the credential to the USB flash drive 100 through a predetermined series, combination, and/or timing of activation of one or more selectors 130 .
  • the USB flash drive may provide one or more key selectors 132 specifically adapted to receive a credential.
  • the key selector 132 may include a biometric device such as a fingerprint sensor detecting a fingerprint of a finger placed proximate the biometric device or a retina sensor detecting a retina.
  • the key selector 132 may include an alpha-numeric key pad or nay other suitable selector which may also be used to indicate a selected data portion.
  • a decision component may compare the received credential with the basis credential and may be supported by any suitable computing device.
  • the decision component 140 may be described in the general context of computer-executable instructions, such as program modules, being executed by a processor.
  • program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types.
  • the decision component may be provided by a host computer system 102 attached to the USB flash drive through the USB connector.
  • the decision component may be part of the USB driver or any other component supported by the host computer system.
  • the host computer system 102 may provide a user interface to accept the credential input by the user and/or receive the credential from the USB flash drive 100 .
  • the host computer system may communicate the input credential to the decision component for authentication.
  • the decision component may access the basis credential, stored in any suitable manner, and compare the received credential with the stored basis credential.
  • the host computer system may provide a user interface to allow the user to access the data stored in the private partition.
  • the decision component may be supported by the USB flash drive 100 .
  • the USB flash drive may include a decision component 140 accessed by the controller 110 .
  • the USB flash drive may authenticate the received credential.
  • the user may input a credential, such as through one or more selectors 130 and/or received from the host computer 102 .
  • the controller may communicate the received credential to the decision component 140 .
  • the decision component may access a stored basis credential and compare the basis and received credentials.
  • the controller in communication with the decision component of the USB flash drive may allow access to the data stored in the private partition of the nonvolatile computer readable medium.
  • the controller may expose and/or decrypt the data stored in the private partition.
  • the credential allowing access to the private partition may include completion of some action and/or operation by the user.
  • the user may be required to review and/or access a predetermined data file such as rules regarding use of the information stored in the private partition, advertisements, and the like. More particularly, the user may be presented with advertisements of products and/or services which are provided by advertisers.
  • the advertisement review may be required for credential authentication each time a credential is provided; at the beginning of a time period, e.g., daily, weekly, and the like; and/or the first time a user requests access to the private partition.
  • the advertisements or other data may be stored on the USB flash drive as appropriate, such as in the firmware and/or the nonvolatile computer readable medium.
  • the USB flash drive may delete the data providing the action/operation as appropriate. For example, if the user is required to review one or more advertisements only the first time the private partition is accessed, the USB flash drive may delete the advertisement from the nonvolatile computer readable medium or allow the user to overwrite the memory location, to allow the user to use that memory for their directed purpose.
  • the USB flash drive may ‘burn a fuse’ to that portion of memory storing the data supporting the required action. For example, memory can be read using a low voltage across a physical bridge. The ‘read only’ bridge may be ‘broken’ or burned like a fuse by applying a higher voltage.
  • the controller and its associated memory may include a virtual or physical switch which may be flipped to deny access to the memory location. In this manner, a virtual fuse, or access to the private partition, may be burned.
  • a decision component such as the decision component 140 shown in FIG. 1 , may attempt to authenticate the received credential. If the decision component determines that the received credential is not authentic, the USB flash drive may deny access to the private partition of the computer readable medium. Access may be denied by maintaining the hidden and/or encrypted status of the data stored in the private partition. In some cases, the USB flash drive may not only deny access, but also remove access to the data of the private partition by ‘burning a fuse’ to the data as described above.
  • a user may not access the data in the private partition, even if an authentic credential is subsequently provided to the USB flash drive; however in some cases, an authorized dealer may be able to access and/or retrieve data stored in the private partition if the user presents suitable credentials.
  • the decision component may receive a second credential, e.g., a second try by the user to fulfill the credential requirement. However, the decision component may refuse to authenticate a received credential, such as if the user submits a predetermined number of inauthentic credentials. For example, the controller may maintain a credential attempt count. After a predetermined number of inauthentic credentials, the USB flash drive may deny access to the private partition in any suitable manner.
  • a second credential e.g., a second try by the user to fulfill the credential requirement.
  • the decision component may refuse to authenticate a received credential, such as if the user submits a predetermined number of inauthentic credentials. For example, the controller may maintain a credential attempt count. After a predetermined number of inauthentic credentials, the USB flash drive may deny access to the private partition in any suitable manner.
  • the USB flash drive may request a credential to access the private partition from time to time or after a predetermined event.
  • the controller may require the user to re-present a credential after a pre-determined amount of time has passed, whenever there is a power cycle to the USB flash drive, whenever the host computer system engages a screen saver, whenever the host computer system is put to ‘sleep’ or ‘placed on standby’, whenever the user ‘logs off’ the host computer system, or any other suitable event.
  • the USB flash drive may include one or more selectors 130 , such as a lock selector 135 , which when activated may lock the private partition such that an authentic credential must be presented before further access is allowed. Accordingly, to access the private partition after the predetermined time and/or event, the user may be required to present a credential to be re-authenticated, such as by the decision component.
  • FIG. 3 One example method 300 of authenticating a credential in a USB flash device is illustrated in FIG. 3 with reference to the example USB flash drive of FIG. 1 .
  • data is stored 310 in a private partition of the nonvolatile computer readable medium of the USB flash drive 100 shown in FIG. 1 .
  • the private partition may be any portion of the computer readable medium 112 , such as a predetermined amount of memory storage, one or more particular files and/or documents, all of the available memory storage of the computer readable medium, and any other suitable portion.
  • the user may request 312 data stored in the private partition. For example, the user may select a ‘view private partition’ selector and in response, a user interface dialog may request a credential from the user.
  • presentation of a credential may automatically request access to the private partition.
  • the user may present a credential, which is received 314 by host computer and/or USB flash drive, as noted above.
  • the credential may then be authenticated 316 , such as by a decision component of the host computer system and/or the USB flash drive. If the credential is authenticated 318 , access to the private partition may be allowed 320 , such as by exposing and/or decrypting the data stored in the private partition. If the credential is not authentic, the user may be able to present an additional credential to be authenticated. In this case, the credential attempt count may be increased 324 , such as by the host computer system and/or USB flash drive controller.
  • the credential attempt count may then be compared 326 to a predetermined value to determine if further action should be taken. For example, if the credential attempt count is below a predetermined value, further credentials may be received and authenticated. However, if the credential attempt count exceeds or equals a predetermined value, further attempts to authenticate a credential may be denied 322 . Access to the private partition may be denied by maintaining hiding or encryption of the private partition, burning a fuse to the private partition, refusing to receive and/or authenticate additional credentials, and/or in any other suitable manner. In some cases, denial of receiving credentials to be authenticated may be maintained until a predetermined event occurs. For example, the predetermined event may be the expiration of a period of time, the USB flash drive is connected to a predetermined host computer system, the USB flash drive is released by an authorized dealer, or any other suitable event.
  • a USB device typically derives power for operation through the direct physical attachment of the USB connector 106 to the USB port 104 of the host computer system 102 .
  • the USB flash drive may include a power supply 126 , independent of an the USB connector 106 , to provide power to one or more components of the USB flash drive.
  • the power supply may provide power to the controller 110 , the computer readable medium 112 , the transmitter 122 , the receiver 124 , the selectors 130 , firmware 120 , and/or the decision component 140 .
  • any suitable power supply 126 may be used as appropriate in the USB flash drive 100 including any combination of a battery, a solar power system, a piezoelectric system, a power system energized by an external frequency or magnetic field including those similar to radio frequency identification systems, and the like.
  • the USB flash drive 100 may include a power supply 126 including a battery which may be recharged from time to time by power derived from host computer system 102 through the USB connector and/or a solar power supply such as solar cells. In this manner, the USB flash drive may derive power from the host computer 102 when the USB connector is physically attached to the USB port and may also operate separated from the host computer 102 .
  • the USB flash drive may transmit data from the nonvolatile computer medium 112 to an external device without a host computer system attachment.
  • the USB flash drive may receive and authenticate a credential to access a private partition without a direct attachment to a host computer system.
  • any USB device may provide its intended function and/or operation without a physical attachment to a host computer system.
  • FIGS. 4-7 illustrate various combinations of the elements described above, where like reference numbers represent like elements.
  • FIG. 4 illustrates a USB flash drive 400 .
  • the USB flash drive 400 may include a USB connector 106 connectable with a USB port of a host computer system 104 , a controller 110 , firmware 120 , a USB interface 108 , and a computer readable medium interface 118 .
  • the USB flash drive may also include a nonvolatile computer readable medium which may include one or more flash memories 114 , 116 .
  • the USB flash drive may include a transmitter 122 which may transmit data from the computer readable medium 112 to an external device 150 . The data may be transmitted by the transmitter directly, compressed, wirelessly, and/or over a modulated data signal designed to encode digital information.
  • the USB flash drive may also include one or more selectors which may include a transmission initiation selector 134 and/or a data indicator 138 .
  • the USB flash drive 400 may include a power supply 126 providing power to one or more components of the USB flash drive. In this manner, a user may receive a data transfer and store the received data in the flash memory without requiring a connection of the USB connector 106 to the USB port 104 .
  • FIG. 5 illustrates a USB flash drive 500 .
  • the USB flash drive 500 may include a USB connector 106 connectable with a USB port of a host computer system 104 , a controller 110 , firmware 120 , a USB interface 108 , and a computer readable medium interface 118 .
  • the USB flash drive may also include a nonvolatile computer readable medium which may include one or more flash memories 114 , 116 .
  • the USB flash drive may include a receiver 124 which may receive data from an external device 150 apart from the USB connector 106 . The data may be received by the receiver 124 directly, compressed, wirelessly, and/or over a modulated data signal designed to encode digital information.
  • the USB flash drive may also include one or more selectors 130 .
  • FIG. 6 illustrates a USB device 600 which may be any type of USB compatible device such as a consumer electronic device, a printer, a scanner, a memory device, and the like.
  • the USB device 600 may include a USB connector 106 connectable with a USB port of a host computer system 104 , a controller 110 , firmware 120 , and a USB interface 108 .
  • the USB device 600 may include one or more selectors 130 such as keys 132 , which may allow a user to present a credential such as a password or other credential to the USB device without having to interface through the host computer system 102 .
  • the received credential may be authenticated by the decision component 140 of the USB device. If the credential is authenticated, a function and/or operation of the USB device may be allowed.
  • the USB device 600 may also include a lock selector 135 which allows a user to reset a lock, requiring a user to re-present a valid credential to access the locked function and/or operation.
  • the USB device 600 may include a power supply 126 providing power to one or more components of the USB device. In this manner, a user may provide a credential, authenticate a credential, and/or provide a function and/or operation of the USB device without requiring a connection of the USB connector 106 to the USB port 104 of a host computer system.
  • FIG. 7 illustrates a USB device 700 which may be any type of USB compatible device such as a consumer electronic device, a printer, a scanner, a memory device, and the like.
  • the USB device 700 may include a USB connector 106 connectable with a USB port of a host computer system 104 , a controller 110 , firmware 120 , and a USB interface 108 .
  • the USB device 600 may include one or more selectors 130 .
  • the USB device 700 may include a power supply 126 providing power to one or more components of the USB device. In this manner, the USB device may provide a function and/or an operation of the USB device without requiring a connection of the USB connector 106 to the USB port 104 of a host computer system.
  • the power supply 126 may be charged with power received through a connection of the USB connector with a USB port of a host computer system.
  • USB devices 600 , 700 may include a variety of computer readable media.
  • Computer readable media can be any available media that can be accessed by a controller of the USB device and includes both volatile and nonvolatile media, removable and non-removable media.
  • Computer readable media may comprise computer storage media and communication media.
  • Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules, or other data.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by the controller of the USB device.
  • the drives and their associated computer storage media discussed above and illustrated in FIGS. 1, 4 , 5 , 6 , and 7 provide storage of computer readable instructions data structures, program modules and other data for the USB device.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Software Systems (AREA)
  • Storage Device Security (AREA)
  • Information Transfer Systems (AREA)
US10/951,547 2004-09-28 2004-09-28 Universal serial bus device Abandoned US20060069819A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US10/951,547 US20060069819A1 (en) 2004-09-28 2004-09-28 Universal serial bus device
US10/975,666 US7765341B2 (en) 2004-09-28 2004-10-28 Universal serial bus device including a USB connector and a transmitter
US11/192,291 US7747797B2 (en) 2004-09-28 2005-07-29 Mass storage device with near field communications
EP05108923A EP1640846A2 (en) 2004-09-28 2005-09-27 Secure access to a device connected to a Universal Serial Bus (USB)
CNA2005101283850A CN1818888A (zh) 2004-09-28 2005-09-28 通用串行总线设备
KR1020050090322A KR20060051723A (ko) 2004-09-28 2005-09-28 유니버설 시리얼 버스 장치
JP2005282028A JP2006099776A (ja) 2004-09-28 2005-09-28 ユニバーサルシリアルバスデバイス

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US10/951,547 US20060069819A1 (en) 2004-09-28 2004-09-28 Universal serial bus device

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US10/975,666 Continuation US7765341B2 (en) 2004-09-28 2004-10-28 Universal serial bus device including a USB connector and a transmitter
US11/192,291 Continuation-In-Part US7747797B2 (en) 2004-09-28 2005-07-29 Mass storage device with near field communications

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US20060069819A1 true US20060069819A1 (en) 2006-03-30

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US10/975,666 Expired - Fee Related US7765341B2 (en) 2004-09-28 2004-10-28 Universal serial bus device including a USB connector and a transmitter

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US20060069840A1 (en) 2006-03-30
JP2006099776A (ja) 2006-04-13
EP1640846A2 (en) 2006-03-29
US7765341B2 (en) 2010-07-27
CN1818888A (zh) 2006-08-16

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