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Apparatus and method for locking and unlocking removable media for use inside and outside protected systems

  • US 10,614,219 B2
  • Filed: 03/27/2017
  • Issued: 04/07/2020
  • Est. Priority Date: 06/03/2016
  • Status: Active Grant
First Claim
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1. An apparatus for locking and unlocking removable media for use in a protected system, the apparatus comprising:

  • at least one interface configured to be coupled to a removable storage device; and

    at least one processing device configured to;

    detect the removable storage device; and

    perform a check-in process for the removable storage device, wherein, to perform the check-in process, the at least one processing device is configured to;

    scan the storage device to identify any malware contained on the removable storage device;

    calculate a current hash value using a hash generation algorithm for each of one or more files stored on the removable storage device;

    verify whether each of the one or more files stored on the removable storage device is clean by verifying that the current hash value calculated for the corresponding file matches a prior hash value calculated for the corresponding file, the prior hash value stored on the removable storage device;

    lock a file system of the removable storage device by modifying the file system of the removable storage device such that (i) one or more protected nodes within a protected system are able to recognize the modified file system of the removable storage device and (ii) nodes outside of the protected system cannot recognize the modified file system of the removable storage device;

    allow the protected system to access the files that are verified to be clean while blocking access to the files that are not verified to be clean; and

    perform a check-out process for the removable storage device, wherein, to perform the check-out process, the at least one processing device is configured to restore the file system so that (i) the one or more protected nodes within the protected system cannot recognize the restored file system of the removable storage device and (ii) the nodes outside of the protected system are able to recognize the restored file system of the removable storage device.

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