Abstract: A method and system are disclosed for the implementation of a weakened privacy channel. This is achieved through use of a weakened symmetric cryptographic algorithm called commercial data masking. The masked text is created from clear text at one system and may to transported electronically to another system where the masked text may be unmasked to produce the clear text. The reason to use the commercial data masking algorithm for data privacy is that it is exportable to organizations to which products which contain the Data Encryption Algorithm when used for data privacy are not exportable. In addition, a method and system is disclosed by which the key when used for commercial data masking may be transformed into a key that may be used with the Data Encryption Algorithm.

Abstract: A method and system are disclosed for securely distributing a plurality of software files from a software distribution processor to a user processor, while selectively enabling the user processor to only use a subset of a lesser plurality of the software files. This is achieved by employing a customer key which includes a clear customer number and a derived portion derived from the customer number. The customer key is transformed into a second customer key which serves as a key expression for encrypting a file encryption key specifically intended for a respective one of the plurality of files. A plurality of software files can be stored together, for example on a CD-ROM, with each file encrypted under a corresponding file encryption key. The CD-ROM can be distributed to many user processors. When a specific user processor needs to run one of the software files, a request will be transmitted from the user processor to the software distribution processor.

Abstract: A mechanical draft crossflow cooling tower is provided with a novel hot water distribution structure which overlies a fill assembly. The distribution structure includes a basin which extends horizontally along the length of the fill assembly and the basin bottom is provided with a plurality of metering nozzles for directing the flow evenly across the top face of the fill assembly. Additionally, a flume is located within the confines of the basin and extends horizontally along the length of the latter in spaced disposition from the basin bottom. The flume has opposed sidewalls which are operable as weirs such that the water is evenly directed to all areas of the basin. As such, the static head on each of the nozzles is equivalent throughout the length of the basin so that the hot water is evenly directed toward all areas of the fill assembly regardless of the flow rate of the water.

Abstract: A nuclear magnetic resonance (NMR) magnet assembly includes two pole faces spaced to provide a gap in which is established a uniform magnetic field. The pole pieces have pole faces that are flat and parallel. The pole pieces are mounted on support plates one of which is fixed and the other of which is movable about a pivot point with two degrees of freedom of movement in response to adjustment of two adjustable mechanisms. Each adjustment mechanism includes a differential screw that produces a transverse movement and a longitudinally inclined pin or pins that translates such transverse movement into a much greatly reduced longitudinal movement. The combination of a differential screw and inclined pin provides a very fine adjustment of the parallelism of the pole faces. Each mechanism further includes means for providing a coarse adjustment.