Other

Microsoft Technology Licensing, LLC

Jon T Lange

Ling Tony Chen

Daniel Ron Simon

Josh D Benaloh

Dinarte R Morais

Machine instructions comprising a bootstrap code are buried within a critical component of an electronic game console where they cannot readily be accessed or modified. A preloader portion in a read only memory (ROM) is hashed by the bootstrap code and the result is compared to an expected hash value maintained in the bootstrap code. Further verification of the boot-up process is carried out by the preloader, which hashes the code in ROM to obtain a hash value for the code. The result is verified against a digital signature value that defines an expected value for this hash. Failure to obtain any expected result terminates the boot-up process. Since the bootstrap code confirms the preloader, and the preloader confirms the remainder of the code in ROM, this technique is useful for ensuring that the code used for booting up the device has not been modified or replaced.

Use of hashing in a secure boot loader

Method and apparatus for storing and moving an x-ray detector assembly in and out of the field of radiation produced by a radiation therapy simulator source while remaining affixed to the gantry of the simulator and retaining the functional attributes of a standard radiation therapy simulator cassette holder. When mounted to the simulator, the apparatus of the present invention has the ability to position an x-ray cassette in a fixed position relative to the radiation source, allow for the use of an image intensifier tube by being effectively radiolucent over the tube, and incorporating a mechanism which is capable of absorbing a degree of movement independent of the gantry while simultaneously activating a switch mechanism which can be used to stop gantry rotation, thereby preventing damage to the device or that which it contacts.

Apparatus for detecting a change in position of first and second members

Method and apparatus for mounting the detector array of a CT scanner to

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San Antonio, TX, United States of America

Jon T Lange