Patent ID: 8555070
Filing Date: 2013-10-08
Classification: G06F,G16H

Abstract:
1. A method for controlling access to a medical system, comprising: calculating, at a computing device, a plurality of signature values for at least one file approved for use with said medical system by a party, wherein said calculating employs a plurality of hashing algorithms; and causing the computing device to provide the plurality of signature values in the signature file, wherein each signature value in the signature file is calculated for one associated file and provided with the one associated file to a file system on an external memory storage device, the one associated file deemed acceptable for use within the medical system by the party; wherein the plurality of hashing algorithms are selected by the party based on a size and number of files anticipated to be provided in the signature file; wherein one signature value and one associated file are configured to be received from the external memory storage device at the medical system, and the medical system is configured to decrypt the signature value using one of the plurality of hashing algorithms to produce a decrypted signature value, and compare the decrypted signature value against most recent known decrypted signature values provided to the medical system from the party, to verify the associated file is an acceptable file for use on the medical system, and further wherein the medical system verifying the associated file causes the medical system to afford access by a verified acceptable file to medical system computational resources and deny access by an unverified file to medical system computational resources; wherein altering one from a group consisting of the signature file and the associated file on the external memory storage device results in the medical system not verifying the associated file and denying access by the associated file to medical system computational resources.