Patents by Inventor Mark David AAGAARD

Mark David AAGAARD 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).

  • Lightweight stream cipher cryptosystems
    Patent number: 8953784
    Abstract: There is disclosed an apparatus and method for generating a keystream with ideal two-level autocorrelation, which can be efficiently implemented in both software and hardware on mobile devices requiring high security protection and in resource limited smart devices such as RFID chips. In one embodiment, a 16-bit Welch-Gong (WG) transformation is used as the filtering function, which is applied to 16-bit input values generated from a linear feedback shift register. In another embodiment, an 8-bit WG transformation is used which is applied to 8-bit input values generated from a linear feedback shift register.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: February 10, 2015
    Inventors: Guang Gong, Mark David Aagaard, Xinxin Fan
  • LIGHTWEIGHT STREAM CIPHER CRYPTOSYSTEMS
    Publication number: 20130108039
    Abstract: There is disclosed an apparatus and method for generating a keystream with ideal two-level autocorrelation, which can be efficiently implemented in both software and hardware on mobile devices requiring high security protection and in resource limited smart devices such as RFID chips. In one embodiment, a 16-bit Welch-Gong (WG) transformation is used as the filtering function, which is applied to 16-bit input values generated from a linear feedback shift register. In another embodiment, an 8-bit WG transformation is used which is applied to 8-bit input values generated from a linear feedback shift register.
    Type: Application
    Filed: August 30, 2012
    Publication date: May 2, 2013
    Inventors: Guang GONG, Mark David AAGAARD, Xinxin FAN