A security management unit, host controller interface with the same, methods of operating a host controller interface, and devices having a host controller interface

摘要

A method of operating a host controller interface (1400, 2400, 3510) includes receiving a buffer descriptor having sector information from a main memory (1200, 2200, 3400), retrieving data using a source address stored in the buffer memory. Descriptor, selecting one of a plurality of entries contained in a security policy table (322A, 322B) by using the sector information and determining whether the retrieved data is using a security policy contained in the selected entry to be encrypted.