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    • 10. 发明申请
    • MEMORY PROTECTION SYSTEMS AND METHODS FOR WRITABLE MEMORY
    • 内存保护系统和可写存储器的方法
    • WO2004099947A2
    • 2004-11-18
    • PCT/CA2004000543
    • 2004-04-08
    • NORTEL NETWORKS LTDCHOW JERRY
    • CHOW JERRY
    • G06F1/00
    • G06F21/79G06F12/1466G06F21/71G06F21/76G06F21/805G06F2221/2141G06F2221/2143G06F2221/2149G06F2221/2153
    • Protected memory locations or contents are associated with respective corresponding keys. Memory operations that alter the protected memory locations or contents are denied unless the corresponding keys are provided. In one implementation, the keys are stored in a key store on an electronic device and accessible only to a memory access manager that controls access to the protected memory and contents. In order to alter a protected memory location or contents, an electronic device component must first obtain the required key or keys from another source, such as a source from which data to be written to a protected memory location is received, and then provide the or each key to the memory access manager. After a memory operation has been permitted or completed, any keys provided to the memory access manager by an electronic device component are rendered inaccessible, such as by deleting the keys from memory.
    • 受保护的存储器位置或内容与相应的对应的键相关联。 改变受保护的内存位置或内容的内存操作将被拒绝,除非提供相应的密钥。 在一个实现中,密钥存储在电子设备上的密钥存储器中,并且仅可访问控制对受保护存储器和内容的访问的存储器访问管理器。 为了改变受保护的存储器位置或内容,电子设备组件必须首先从另一个源获得所需的密钥或密钥,例如从其接收要写入受保护存储器位置的数据的源,然后提供或 每个密钥到内存访问管理器。 在允许或完成存储器操作之后,通过电子设备组件提供给存储器访问管理器的任何键都是不可访问的,例如通过从存储器中删除密钥。