MANAGEMENT OF DATA PROCESSING SECURITY IN A SECONDARY PROCESSOR
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United States of America Patent
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app pub date -
Feb 26, 2013
filing date -
Apr 17, 2012
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Abandoned
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Abstract
A data processing apparatus is configured to perform secure data processing operations and non-secure data processing operations, wherein the apparatus includes a master device with a secure domain and a non-secure domain. Components of the master device operate in the secure domain when performing secure data processing operations and operate in the non-secure domain when performing the non-secure data processing operations. A slave device is configured to perform a delegated data processing operation specified by the master device and a communication bus connecting the master device to the slave device. The delegated operation is initiated by an issuing component in the master device, wherein the slave device includes a security inheritance mechanism configured to cause the delegated operation to inherit a non-secure security status or a secure status depending upon whether the issuing component in the master device is operating in the non-secure domain or the secure domain.
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