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1. 发明授权

US09269418B2 Apparatus and method for controlling refreshing of data in a DRAM 有权
标题翻译：用于控制DRAM中数据刷新的装置和方法
公开(公告)号：US09269418B2
公开(公告)日：2016-02-23
申请号：US13366660
申请日：2012-02-06
申请人： Donald Felton , Emre Özer , Sachin Satish Idgunji
发明人： Donald Felton , Emre Özer , Sachin Satish Idgunji
IPC分类号： G06F12/14 , G11C11/406 , G06F21/75 , G06F21/79 , G11C11/408
CPC分类号： G11C11/40622 , G06F21/75 , G06F21/79 , G11C11/408 , G11C2211/4065
摘要： An apparatus comprises a dynamic random-access memory (DRAM) for storing data. Refresh control circuitry is provided to control the DRAM to periodically perform a refresh cycle for refreshing the data stored in each memory location of the DRAM. A refresh address sequence generator generates a refresh address sequence of addresses identifying the order in which memory locations of the DRAM are refreshed during the refresh cycle. To deter differential power analysis attacks on secure data stored in the DRAM, the refresh address sequence is generated with the addresses of at least a portion of the memory locations in a random order which varies from refresh cycle to refresh cycle.
摘要翻译：一种装置包括用于存储数据的动态随机存取存储器（DRAM）。提供刷新控制电路以控制DRAM周期性地执行用于刷新存储在DRAM的每个存储器位置中的数据的刷新周期。刷新地址序列发生器产生识别在刷新周期期间刷新DRAM的存储器位置的顺序的地址的刷新地址序列。为了阻止对存储在DRAM中的安全数据的差分功率分析攻击，刷新地址序列以从刷新周期到刷新周期的随机顺序的至少一部分存储器位置的地址生成。

2. 发明授权

US08131942B2 Control data modification within a cache memory 有权
标题翻译：控制缓存内存中的数据修改
公开(公告)号：US08131942B2
公开(公告)日：2012-03-06
申请号：US12081530
申请日：2008-04-17
申请人： Peter William Harris , Donald Felton
发明人： Peter William Harris , Donald Felton
IPC分类号： G06F12/00
CPC分类号： G06F12/084 , G06F12/1425 , G06F12/1491 , G06F21/00 , G06F21/6218 , G06F2212/1028 , G06F2212/1052 , Y02D10/13
摘要： A data processing system is provided with at least one processor 4, 6, a main memory 18 and a cache memory 14. Cache data within the cache memory 14 has validity data V and control data associated therewith. The control data controls access to the cached data. Program instructions executed by the processors 4, 6 control a cache controller 26 to modify the control data associated with the cached data while it remains stored within the cache memory 14 and remains valid. The control data may, for example, specify a security flags indicating whether access is restricted to secure processes or processors.
摘要翻译：数据处理系统设置有至少一个处理器4,6，主存储器18和高速缓存存储器14.高速缓存存储器14内的高速缓存数据具有有效数据V和与其相关联的控制数据。控制数据控制对缓存数据的访问。由处理器4,6执行的程序指令控制高速缓存控制器26，以便在缓存数据保持存储在高速缓冲存储器14中时修改与缓存数据相关联的控制数据，并保持有效。控制数据例如可以指定指示是否将访问限制到安全进程或处理器的安全标志。

3. 发明申请

US20060020826A1 Secure operation indicator 有权
标题翻译：安全操作指示
公开(公告)号：US20060020826A1
公开(公告)日：2006-01-26
申请号：US11141689
申请日：2005-06-01
申请人： Donald Felton , James McNiven
发明人： Donald Felton , James McNiven
IPC分类号： G06F12/14
CPC分类号： G06F21/84 , G06F2221/2105
摘要： A data processing apparatus and a method of indicating operation of a data processor within a secure domain. The apparatus comprising a display for displaying data; a processor operable in a secure domain, said processor when operating in said secure domain having access to a user specific image; wherein said processor is operable to indicate operation within said secure domain by displaying said user specific image on at least a portion of said display when operating within said secure domain.
摘要翻译：一种数据处理装置和指示安全域内的数据处理器的操作的方法。该装置包括用于显示数据的显示器; 处理器，其可操作在安全域中，所述处理器在所述安全域中操作时可访问用户特定图像; 其中所述处理器可操作以通过在所述安全域内操作时在所述显示器的至少一部分上显示所述用户特定图像来指示所述安全域内的操作。

4. 发明申请

US20080294848A1 Control data modification within a cache memory 有权
标题翻译：控制缓存内存中的数据修改
公开(公告)号：US20080294848A1
公开(公告)日：2008-11-27
申请号：US12081530
申请日：2008-04-17
申请人： Peter William Harris , Donald Felton
发明人： Peter William Harris , Donald Felton
IPC分类号： G06F12/08
CPC分类号： G06F12/084 , G06F12/1425 , G06F12/1491 , G06F21/00 , G06F21/6218 , G06F2212/1028 , G06F2212/1052 , Y02D10/13
摘要： A data processing system is provided with at least one processor 4, 6, a main memory 18 and a cache memory 14. Cache data within the cache memory 14 has validity data V and control data associated therewith. The control data controls access to the cached data. Program instructions executed by the processors 4, 6 control a cache controller 26 to modify the control data associated with the cached data whilst it remains stored within the cache memory 14 and remains valid. The control data may, for example, specify a security flags indicating whether access is restricted to secure processes or processors.
摘要翻译：数据处理系统设置有至少一个处理器4,6，主存储器18和高速缓存存储器14.高速缓冲存储器14内的高速缓存数据具有有效数据V和与其相关联的控制数据。控制数据控制对缓存数据的访问。由处理器4,6执行的程序指令控制高速缓存控制器26，以修改与缓存数据相关联的控制数据，同时其保持存储在高速缓冲存储器14内并保持有效。控制数据例如可以指定指示是否将访问限制到安全进程或处理器的安全标志。

5. 发明申请

US20070220276A1 Managing access to content in a data processing apparatus 有权
标题翻译：管理对数据处理设备中的内容的访问
公开(公告)号：US20070220276A1
公开(公告)日：2007-09-20
申请号：US11376733
申请日：2006-03-16
申请人： Daren Croxford , Donald Felton , Daniel Kershaw , Peter Wilson
发明人： Daren Croxford , Donald Felton , Daniel Kershaw , Peter Wilson
IPC分类号： H04N7/16 , H04L9/32 , G06F12/14 , G06F17/30 , G06F7/04 , H04L9/00 , G06F11/30 , G06K9/00 , H04K1/00 , H03M1/68
CPC分类号： G06F21/79 , G06F12/145 , G06F21/74
摘要： A data processing apparatus and method are provided for managing access to content within the data processing apparatus. The data processing apparatus has a secure domain and a non-secure domain and comprises at least one device which is operable when seeking to access content stored in memory to issue a memory access request pertaining to either the secure domain or the non-secure domain. Further, writeable memory is provided which can store content required by the at least one device, with the writeable memory having at least one read only region whose content is stored therein under control of a secure task, the secure task being a task executed by one of the devices in the secure domain. Protection logic is then used in association with the writeable memory, which on receipt of a memory access request seeking to access content in the at least one read only region, prevents access to that read only region if that memory access request pertains to the non-secure domain and is seeking to write content to the read only region. This enables the speed, power and flexibility benefits of placing content in writeable memory to be achieved without prejudicing the security of that content, by ensuring that that content cannot be modified from the non-secure domain.
摘要翻译：提供了一种用于管理对数据处理装置内的内容的访问的数据处理装置和方法。数据处理装置具有安全域和非安全域，并且包括至少一个设备，当设法访问存储在存储器中的内容以发布与安全域或非安全域相关的存储器访问请求时可操作。此外，提供可写存储器，其可以存储至少一个设备所需的内容，其中可写存储器具有至少一个只读区域，其内容在安全任务的控制下存储在其中，该安全任务是由一个执行的任务的安全域中的设备。然后，与可写存储器相关联地使用保护逻辑，其在接收到寻求访问所述至少一个只读区域中的内容的存储器访问请求时，如果该存储器访问请求涉及非可读存储器访问请求，并且正在寻求将内容写入只读区域。这使得通过确保不能从非安全域修改该内容，可以实现将内容放置在可写入内存中的速度，功率和灵活性，而不会影响该内容的安全性。

6. 发明授权

US07730545B2 Test access control for secure integrated circuits 有权
标题翻译：测试安全集成电路的访问控制
公开(公告)号：US07730545B2
公开(公告)日：2010-06-01
申请号：US11134514
申请日：2005-05-23
申请人： George James Milne , Andrew Brookfield Swaine , Donald Felton
发明人： George James Milne , Andrew Brookfield Swaine , Donald Felton
IPC分类号： G06F7/04 , G06F11/00
CPC分类号： G01R31/31719 , G06F21/35
摘要： Test access to an integrated circuit 2 is controlled by the use of test access enabling keys. A plurality of different test access enabling levels may be supported corresponding to different keys. The test access control may be performed by dedicated hardware or software executing a secure privilege mode.
摘要翻译：通过使用测试访问启用键来控制对集成电路2的访问。可以根据不同的键支持多个不同的测试访问启用级别。测试访问控制可以由执行安全特权模式的专用硬件或软件执行。

7. 发明申请

US20090172329A1 Providing secure services to a non-secure application 有权
标题翻译：为非安全应用程序提供安全服务
公开(公告)号：US20090172329A1
公开(公告)日：2009-07-02
申请号：US12003857
申请日：2008-01-02
申请人： Nigel Charles Paver , Stuart David Biles , Donald Felton
发明人： Nigel Charles Paver , Stuart David Biles , Donald Felton
IPC分类号： G06F12/14 , G06F9/46
CPC分类号： G06F21/74 , G06F12/1491 , G06F21/72
摘要： A data processing apparatus comprising a data processor for processing data in a secure and a non-secure mode, said data processor processing data in said secure mode having access to secure data that is not accessible to said data processor processing data in said non-secure mode; and a further processing device for performing a task in response to a request from said data processor issued from said non-secure mode, said task comprising processing data at least some of which is secure data, said further processing device comprising a secure data store, said secure data store not being accessible to processes running on said data processor in non-secure mode; wherein prior to issuing any of said requests said data processor is adapted to perform a set up operation on said further data processing device, said set up operation being performed by said data processor operating in said secure mode and comprising storing secure data in said secure data store on said further processing device, said secure data being secure data required by said further processing device to perform said task; wherein in response to receipt of said request from said data processor operating in said non-secure mode said further data processing device performs said task using data stored in said secure data store to access any secure data required.
摘要翻译：一种数据处理装置，包括用于以安全和非安全模式处理数据的数据处理器，所述数据处理器处理所述安全模式中的数据，以访问所述数据处理器不可访问的安全数据，所述数据处理器处理所述非安全模式; 以及另外的处理装置，用于响应于从所述非安全模式发出的来自所述数据处理器的请求执行任务，所述任务包括处理数据，其中至少一些是安全数据，所述另外的处理装置包括安全数据存储，所述安全数据存储器不能以非安全模式在所述数据处理器上运行的进程访问; 其中在发出任何所述请求之前，所述数据处理器适于对所述另外的数据处理设备执行建立操作，所述建立操作由所述数据处理器以所述安全模式操作并且包括将安全数据存储在所述安全数据中存储在所述另外的处理设备上，所述安全数据是所述另外的处理设备执行所述任务所需的安全数据; 其中响应于以所述非安全模式操作的所述数据处理器接收到所述请求，所述另外的数据处理设备使用存储在所述安全数据存储器中的数据来执行所述任务以访问所需的任何安全数据。

8. 发明申请

US20060179259A1 Data Processing apparatus and method for controlling access to memory 有权
标题翻译：用于控制对存储器的访问的数据处理装置和方法
公开(公告)号：US20060179259A1
公开(公告)日：2006-08-10
申请号：US11230498
申请日：2005-09-21
申请人： Daniel Kershaw , Donald Felton , Ashley Stevens , Anthony Thompson
发明人： Daniel Kershaw , Donald Felton , Ashley Stevens , Anthony Thompson
IPC分类号： G06F13/00
CPC分类号： G06F12/145 , G06F12/1081 , G06F12/1491
摘要： A data processing apparatus and method are provided for controlling access to memory. The data processing apparatus comprises main processing logic operable to execute a sequence of instructions in order to perform a process, and subsidiary processing logic operable to perform at least part of the process on behalf of the main processing logic. A memory is provided that is accessible by the main processing logic when performing the process, the main processing logic defining a portion of the memory to be allocated memory accessible to the subsidiary processing logic when performing part of the process on behalf of the main processing logic. Further, a memory management unit is provided that is programmable by the main processing logic and operable to control access to the allocated memory by the subsidiary processing logic. The main processing logic is arranged to program the memory management unit such that for an access request issued by the subsidiary processing logic relating to the allocated memory, the memory management unit produces a memory address and one or more associated memory attributes identifying one or more properties of the allocated memory at that memory address.
摘要翻译：提供了一种用于控制对存储器的访问的数据处理装置和方法。数据处理装置包括主处理逻辑，其可操作以执行指令序列以便执行处理，以及辅助处理逻辑可操作以代表主处理逻辑执行至少一部分处理。提供在执行处理时可由主处理逻辑访问的存储器，主处理逻辑定义了当代表主处理逻辑执行部分处理时辅助处理逻辑可访问的待分配存储器的一部分的存储器。此外，提供存储器管理单元，其可由主处理逻辑编程并且可操作以通过辅助处理逻辑控制对所分配的存储器的访问。主处理逻辑被布置为对存储器管理单元进行编程，使得对于与分配的存储器相关的辅助处理逻辑发出的访问请求，存储器管理单元产生存储器地址和一个或多个相关联的存储器属性，其标识一个或多个属性在该存储器地址处分配的存储器。

9. 发明授权

US09158941B2 Managing access to content in a data processing apparatus 有权
标题翻译：管理对数据处理设备中的内容的访问
公开(公告)号：US09158941B2
公开(公告)日：2015-10-13
申请号：US11376733
申请日：2006-03-16
申请人： Daren Croxford , Donald Felton , Daniel Kershaw , Peter Brian Wilson
发明人： Daren Croxford , Donald Felton , Daniel Kershaw , Peter Brian Wilson
IPC分类号： G06F17/30 , G06F21/79 , G06F12/14 , G06F21/74
CPC分类号： G06F21/79 , G06F12/145 , G06F21/74
摘要： A data processing apparatus and method are provided for managing access to content within the data processing apparatus. The data processing apparatus has a secure domain and a non-secure domain and comprises at least one device which is operable when seeking to access content stored in memory to issue a memory access request pertaining to either the secure domain or the non-secure domain. Further, writeable memory is provided which can store content required by the at least one device, with the writeable memory having at least one read only region whose content is stored therein under control of a secure task, the secure task being a task executed by one of the devices in the secure domain. Protection logic is then used in association with the writeable memory, which on receipt of a memory access request seeking to access content in the at least one read only region, prevents access to that read only region if that memory access request pertains to the non-secure domain and is seeking to write content to the read only region. This enables the speed, power and flexibility benefits of placing content in writeable memory to be achieved without prejudicing the security of that content, by ensuring that that content cannot be modified from the non-secure domain.
摘要翻译：提供了一种用于管理对数据处理装置内的内容的访问的数据处理装置和方法。数据处理装置具有安全域和非安全域，并且包括至少一个设备，当设法访问存储在存储器中的内容以发布与安全域或非安全域相关的存储器访问请求时可操作。此外，提供可写存储器，其可以存储至少一个设备所需的内容，其中可写存储器具有至少一个只读区域，其内容在安全任务的控制下存储在其中，该安全任务是由一个执行的任务的安全域中的设备。然后，与可写存储器相关联地使用保护逻辑，其在接收到寻求访问所述至少一个只读区域中的内容的存储器访问请求时，如果该存储器访问请求涉及非可读存储器访问请求，并且正在寻求将内容写入只读区域。这使得通过确保不能从非安全域修改该内容，可以实现将内容放置在可写入内存中的速度，功率和灵活性，而不会影响该内容的安全性。

10. 发明授权

US08769307B2 Secure operation indicator 有权
标题翻译：安全操作指示
公开(公告)号：US08769307B2
公开(公告)日：2014-07-01
申请号：US11141689
申请日：2005-06-01
申请人： Donald Felton , James I McNiven
发明人： Donald Felton , James I McNiven
IPC分类号： G06F11/30
CPC分类号： G06F21/84 , G06F2221/2105
摘要： A data processing apparatus and a method of indicating operation of a data processor within a secure domain. The apparatus comprising a display for displaying data; a processor operable in a secure domain, said processor when operating in said secure domain having access to a user specific image; wherein said processor is operable to indicate operation within said secure domain by displaying said user specific image on at least a portion of said display when operating within said secure domain.
摘要翻译：一种数据处理装置和指示安全域内的数据处理器的操作的方法。该装置包括用于显示数据的显示器; 处理器，其可操作在安全域中，所述处理器在所述安全域中操作时可访问用户特定图像; 其中所述处理器可操作以通过在所述安全域内操作时在所述显示器的至少一部分上显示所述用户特定图像来指示所述安全域内的操作。

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