Abstract: Disclosed is a foot covering closure mechanism that converts any laced shoe to a design that requires no bending down, sitting or use of the hands to put on or take off ones shoes. The new and unique device utilizes rolling motion actuation for ease of use. Polymeric components for reliability in hostile environments, water seals to keep feet dry and adaptable fastening hardware and exterior color for compatibility with the wide variety of shoes available to the public. Other features make the mechanism easily operated by action of the opposite foot.

Abstract: Disclosed is a foot covering closure mechanism that converts any laced shoe to a design that requires no bending down, sitting or use of the hands to put on or take off ones shoes. The new and unique device utilizes rolling motion actuation for ease of use. Polymeric components for reliability in hostile environments, water seals to keep feet dry and adaptable fastening hardware and exterior color for compatibility with the wide variety of shoes available to the public. Other features make the mechanism easily operated by action of the opposite foot.

Abstract: A method for calculating checksums includes calculating a first checksum based at least in part on a first block of data, and calculating a partial checksum based at least in part on a second block of data. The second block of data comprises a data portion followed by a fill portion, the fill portion having a length equal to a length of the first block of data. The first checksum and partial checksum are combined to form a second checksum for a total block of data, the total block of data comprising the first block of data and the data portion of the second block of data.