Abstract: A protocol for authenticating a mobile customer unit to a service provider where signaling messages are encrypted and where voice communications can be encrypted. A service provider assigns to each mobile customer unit a unique "secret", along with other information such as a telephone number. At the pleasure of the service provider, a directive is sent to the mobile customer unit to create a shared secret datum based on the secret. The shared secret datum is created with the aid of a bit string that is sent for thatpurpose by the provider. A portion of the created shared secret datum is used for encrypting speech and the same or other portion of the created shared secret datum is used as an input to a process for creating a second encryption key. That key is employed in the mobile customer unit to encode those of the control signals generated by the mobile customer until that affect the nature of the call in progress.

Abstract: A relatively secure, self-inverting, symmetric key cryptosystem designed for efficient implementation on an 8-bit microcomputer. The cryptosystem is especially well suited use in cellular telephony. The method of encryption is comprised of three stages: 1) an autokeyed encryption, 2) the use of a one-time pad encryption where the key is derived from a portion of the message as encrypted by the first stage, and 3) a second autokeyed decryption that is the inverse of the first.

Abstract: A protocol for authenticating a cellular telephone to a service provider for the purpose of preventing the piracy of cellular services. A service provider assigns a unique "secret", along with other information such as a telephone number, to each cellular telephone when the telephone service is established with the service provider. Each base station of a service provider continuously broadcasts a periodically changing random number to all of the cellular telephones within the base station's jurisdiction. When a cellular telephone first enters the jurisdiction of a base station, it registers itself with the base station by concatenating a secret password and the most recently broadcast random number, along with other information, and passing the concatenated information to a hash function. The cellular telephone then sends the output of the hash function, along with other identifying information to the service provider.

Abstract: A method for administering secure access to files of a computer system. For a process-file pair, a first security label associated with the process is compared with a second security label associated with the file in response to a request to read or write the file. If the security label of the destination (file or process) of the read or write operation does not dominate the security label of the source (file or process), the security label of the destination is dynamically raised accordingly. If the security label of the file or process is raised, an indicator associated with this process and with this file is set to a first state representing that the file is safe for this process-file pair. Indicators associated with every other process linked with this file are set to a second state representing that the file is unsafe for those process-file pairs.

Abstract: A capillary tube is shrunk around a wire heating element, fashioned into the desired configuration, and situated between the exterior surface of a cylindrical inner glass tube and the interior surface of a cylindrical outer glass tube, to form an assembly. The space between the adjacent tube surfaces is evacuated as a heat source is moved along the axis of the assembly to heat each longitudinal section of the assembly, in sequence. The element is thermally expanded as the outer tube surface collapses toward the inner tube surface, resulting in the fusion of the adjacent glass surfaces around the expanded element. In this manner, a channel is formed through the fused glass body which has the configuration and dimensions of the expanded element. During cooling, the element returns to its unexpanded condition. This results in a space between the channel walls and the element, permitting the element to expand, when electrically energized, without breaking the glass body.

Abstract: A capillary tube is shrunk around a wire heating element, fashioned into the desired configuration, and situated between the exterior surface of a cylindrical inner glass tube and the interior surface of a cylindrical outer glass tube, to form an assembly. The space between the adjacent tube surfaces is evacuated as a heat source is moved along the axis of the assembly to heat each longitudinal section of the assembly, in sequence. The element is thermally expanded as the outer tube surface collapses toward the inner tube surface, resulting in the fusion of the adjacent glass surfaces around the expanded element. In this manner, a channel is formed through the fused glass body which has the configuration and dimensions of the expanded element. During cooling, the element returns to its unexpanded condition. This results in a space between the channel walls and the element, permitting the element to expand, when electrically energized, without breaking the glass body.

Abstract: A door lock has a flush-mountable body. A forwardly facing recess is defined by the body. A paddle-type handle is pivotally carried by the body and is movable between a nested position within the body recess and an operating position. A spring-projected slide bolt is carried on the back of the body and is movable between projected and retracted positions. A key-controlled disconnect linkage is provided for selectively connecting and disconnecting the handle and the bolt. The disconnect linkage includes a rotatably-mounted disconnect member which extends longitudinally relative to the bolt. Interengageable formations are provided on the bolt and the disconnect member. The interengageable formations are brought into and out of driving engagement by the movement of a key-operated locking member. When the disconnect linkage drivingly connects the handle and the bolt, movement of the handle from its nested position to an operating position will cause corresponding retracting movement of the bolt.

Abstract: A method of printing textile and other surfaces and particularly relates to a transfer sheet comprising a flexible carrier sheet having a design in a drying ink surface which design is not transferable to a receptor material by the application of heat alone and a polymer layer applied over the design so that the application of heat to the transfer sheet causes the polymer layer to adhere to the receptor material so that the carrier sheet can be removed leaving the ink design transferred to the polymer which itself is totally transferred to the receptor material. The invention also includes a method of forming a transfer and a method of decorating a material, particularly a textile material, using the transfers and methods of the invention.

Abstract: A laminated assembly comprising a base sheet and a screen mesh laminated thereto in a tensioned state relative to the base sheet is provided. A screen printing screen is made therefrom by fixing the assembly on a screen printing frame and removing the base sheet from the assembly whereby to leave the screen mesh tensioned on the frame. By suitable choice of tension in the assembly screens having uniform and controlled mesh tension values may be produced quickly without previous cumbersome procedures.

Abstract: The present invention relates to: process and apparatus for feeding continuous filaments to a continuous multifilament structure utilizing tangentially converging fluid streams to forward the filaments; process and apparatus for detecting breakage of filaments utilizing a rotatable cylinder, or a gap in a three dimensional body, wherein breakage of the filament causes a measurable change in the pressure of fluid flowing to the cylinder or the gap; process and apparatus for the production of continuous multifilament structures wherein, upon breakage of a continuous filament, the breakage detector automatically activates a filament feeder to temporarily insert a substitute filament.

Abstract: A dry transfer sheet of the kind described comprising a carrier sheet, at least one design carried by said carrier sheet and releasably bonded thereto, and a layer of shrinkable pressure sensitive adhesive covering said design and overlapping said carrier sheet to stress the edges of the design to cause at least a reduction of bonding between the edges of the design and the carrier sheet.