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OS security filter

  • US 10,528,719 B2
  • Filed: 05/09/2018
  • Issued: 01/07/2020
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A virtual keyboard device external to a computer comprising:

  • a radio-frequency identification (RFID) reader;

    a processor;

    a transmitter to couple the virtual keyboard device to the computer in a manner that emulates the coupling of a physical keyboard to the computer; and

    a memory module to store instructions that, when executed by the processor, cause the processor to;

    convert RFID signals captured by the RFID reader into a sequence of characters that emulates indications of keypresses of keyboard keys;

    recognize at least one character in the sequence of characters that is interpretable by an operating system of the computer as a system level command to point a cursor generated by the operating system to a command line of the operating system to enable entry of a further one or more characters of the sequence of characters at the command line;

    filter the further one or more characters from the sequence of characters in response to the further one or more characters comprising a malicious command to prevent provision of the malicious command to the computer in the sequence of characters; and

    operate the transmitter to transmit the sequence of characters, following the filtration of the further one or more characters from the sequence of characters, from the virtual keyboard device and to the computer, wherein;

    the operating system is to be executed within the computer to support basic functions of the computer; and

    the basic functions comprise interpretation of sequences of characters received by the computer to identify commands to cause the computer to execute tasks.

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