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1. 发明授权

US06816825B1 Simulation vector generation from HDL descriptions for observability-enhanced statement coverage 有权
标题翻译：来自HDL描述的模拟向量生成可观察性增强语句覆盖
公开(公告)号：US06816825B1
公开(公告)日：2004-11-09
申请号：US09335755
申请日：1999-06-18
申请人： Pranav Ashar , Srinivas Devadas , Farzan Fallah
发明人： Pranav Ashar , Srinivas Devadas , Farzan Fallah
IPC分类号： G06F1750
CPC分类号： G01R31/318307 , G01R31/318364
摘要： A method of automatically generating vector sequences for an observability based coverage metric supports design validation. A design validation method for Register Transfer Level (RTL) circuits includes the generation of a tag list. Each tag in the tag list models an error at a location in HDL code at which a variable is assigned a value. Interacting linear and Boolean constraints are generated for the tag, and the set of constraints is solved using an HSAT solver to provide a vector that covers the tag. For each generated vector, tag simulation is performed to determine which others of the tags in the tag list are also covered by that vector. Vectors are generated until all tags have been covered, if possible within predetermined time constraints, thus automatically providing a set of vectors which will propagate errors in the HDL code to an observable output. Performance of the design validation method is enhanced through various heuristics involving path selection and tag magnitude maximization.
摘要翻译：自动生成基于可观察性的覆盖度量向量序列的方法支持设计验证。寄存器传输级（RTL）电路的设计验证方法包括生成标签列表。标签列表中的每个标签在HDL代码中的变量分配了一个值的位置处模拟错误。为标签生成交互线性和布尔约束，并使用HSAT求解器解决约束集，以提供覆盖标签的向量。对于每个生成的矢量，执行标签模拟以确定标签列表中哪些标签中的哪些标签也被该向量覆盖。如果可能的话在预定的时间限制内，直到所有标签被覆盖为止，才产生向量，从而自动地提供将HDL代码中的错误传播到可观察输出的一组向量。通过涉及路径选择和标签幅度最大化的各种启发式方法，提高了设计验证方法的性能。

2. 发明授权

US07818569B2 Data protection and cryptographic functions using a device-specific value 有权
标题翻译：数据保护和加密功能使用特定于设备的值
公开(公告)号：US07818569B2
公开(公告)日：2010-10-19
申请号：US11421582
申请日：2006-06-01
申请人： Srinivas Devadas , Blaise Gassend
发明人： Srinivas Devadas , Blaise Gassend
IPC分类号： G08B29/00 , G06F21/02 , H01L23/58
CPC分类号： G06F21/31 , G06F21/72 , G06F21/73 , G06F21/77 , G06F21/79 , G06F21/86 , G06F2221/2103 , G06F2221/2121 , G06F2221/2129 , G06F2221/2153 , G06Q20/3674 , G09C1/00 , H01L23/544 , H01L23/576 , H01L2223/54433 , H01L2223/5444 , H01L2223/54473 , H01L2924/0002 , H04L9/0897 , H04L9/3278 , H04L2209/34 , H04L2209/42 , H01L2924/00
摘要： A digital value is generated in an integrated circuit such that the generated value substantially depends on circuit parameters that vary among like devices. The generated digital value is then used, for example, to access protected information in the device or to perform a cryptographic function in the integrated circuit.
摘要翻译：在集成电路中产生数字值，使得所产生的值基本上取决于在类似的装置之间变化的电路参数。所产生的数字值例如用于访问设备中的受保护信息或在集成电路中执行加密功能。

3. 发明授权

US07724760B2 Method and apparatus for bandwidth guarantee and overload protection in a network switch 有权
标题翻译：网络交换机带宽保障和过载保护的方法和装置
公开(公告)号：US07724760B2
公开(公告)日：2010-05-25
申请号：US10639269
申请日：2003-08-12
申请人： Hari Balakrishnan , Srinivas Devadas , Arvind Mithal
发明人： Hari Balakrishnan , Srinivas Devadas , Arvind Mithal
IPC分类号： H04L12/56
CPC分类号： H04L47/10 , H04L47/24 , H04L47/39 , H04L47/50 , H04L47/52 , H04L47/6215 , H04L47/6255 , H04L49/101 , H04L49/254 , H04L49/30 , H04L49/3045
摘要： A method for selecting a queue for service across a shared link. The method includes classifying each queue from a group of queues within a plurality of ingresses into one tier of a number “N” of tiers. The number “N” is greater than or equal to 2. Information about allocated bandwidth is used to classify at least some of the queues into the tiers. Each tier is assigned a different priority. The method also includes matching queues to available egresses by matching queues classified within tiers with higher priorities before matching queues classified within tiers with lower priorities.
摘要翻译：一种用于通过共享链路选择服务队列的方法。该方法包括将来自多个入口内的一组队列中的每个队列分成层数“N”的一层。数字“N”大于或等于2.关于分配的带宽的信息用于将至少一些队列分类到层级中。每个层都有不同的优先级。该方法还包括通过匹配在具有较低优先级的层级中分类的队列之前匹配在具有较高优先级的层级中分类的队列来匹配队列到可用出口。

4. 发明授权

US07681103B2 Reliable generation of a device-specific value 有权
标题翻译：可靠生成特定于设备的值
公开(公告)号：US07681103B2
公开(公告)日：2010-03-16
申请号：US11421588
申请日：2006-06-01
申请人： Srinivas Devadas , Blaise Gassend
发明人： Srinivas Devadas , Blaise Gassend
IPC分类号： G06F11/00
CPC分类号： G06F21/31 , G06F21/72 , G06F21/73 , G06F21/77 , G06F21/79 , G06F21/86 , G06F2221/2103 , G06F2221/2121 , G06F2221/2129 , G06F2221/2153 , G06Q20/3674 , G09C1/00 , H01L23/544 , H01L23/576 , H01L2223/54433 , H01L2223/5444 , H01L2223/54473 , H01L2924/0002 , H04L9/0897 , H04L9/3278 , H04L2209/34 , H04L2209/42 , H01L2924/00
摘要： A device-specific value is reliably generated in a device. In a first component of the device, a first digital value is generated that is substantially dependent fabrication variation among like device. Redundancy information is computed based on the first digital value. A subsequent digital value is later generated in the first component of the device. The first digital value is then determined in a second component of the device from the subsequent digital value and the redundancy information.
摘要翻译：设备特定的值在设备中可靠地生成。在器件的第一部件中，产生第一数字值，其基本上依赖于相似器件之间的制造变化。基于第一数字值计算冗余信息。稍后在设备的第一个组件中生成后续的数字值。然后，在随后的数字值和冗余信息中，在设备的第二分量中确定第一数字值。

5. 发明申请

US20090222672A1 Integrated Circuit That Uses A Dynamic Characteristic Of The Circuit 有权
标题翻译：使用电路动态特性的集成电路
公开(公告)号：US20090222672A1
公开(公告)日：2009-09-03
申请号：US12361811
申请日：2009-01-29
申请人： Dwaine Clarke , Blaise Gassend , Marten Van Dijk , Srinivas Devadas
发明人： Dwaine Clarke , Blaise Gassend , Marten Van Dijk , Srinivas Devadas
IPC分类号： G06F12/14 , G06F19/00 , H04L9/32 , H03K19/00
CPC分类号： G06F21/31 , G06F21/72 , G06F21/73 , G06F21/77 , G06F21/79 , G06F21/86 , G06F2221/2103 , G06F2221/2121 , G06F2221/2129 , G06F2221/2153 , G06Q20/3674 , G09C1/00 , H01L23/544 , H01L23/576 , H01L2223/54433 , H01L2223/5444 , H01L2223/54473 , H01L2924/0002 , H04L9/0897 , H04L9/3278 , H04L2209/34 , H04L2209/42 , H01L2924/00
摘要： An integrated circuit has a first component that has a dynamic characteristic that varies among like integrated circuits, for example, among integrated circuits fabricated using the same lithography mask. Operating the first component produces an output that is dependent on the dynamic characteristic of the first component. A digital value associated with the integrated circuit is generated using the output of the first component, and then the generated digital value is used in operation of the integrated circuit.
摘要翻译：集成电路具有第一部件，其具有在类似的集成电路之间变化的动态特性，例如在使用相同的光刻掩模制造的集成电路中。操作第一组件产生取决于第一组件的动态特性的输出。使用第一分量的输出产生与集成电路相关联的数字值，然后在集成电路的操作中使用所生成的数字值。

6. 发明授权

US07415477B2 Method and apparatus for allocating link bandwidth 失效
标题翻译：分配链路带宽的方法和装置
公开(公告)号：US07415477B2
公开(公告)日：2008-08-19
申请号：US10482864
申请日：2001-07-05
申请人： Srinivas Devadas , Hari Balakrishnan , Daniel Rosenband
发明人： Srinivas Devadas , Hari Balakrishnan , Daniel Rosenband
IPC分类号： G06F15/16 , G06F15/173 , G06F17/00
CPC分类号： H04L47/10 , H04L47/2433 , H04L47/2458 , H04L47/30 , H04L47/39 , H04L47/50 , H04L47/521 , H04L47/6215 , H04L49/30 , H04L49/90 , Y10S707/99942
摘要： A method and apparatus for selecting a queue for service across a shared link. The method includes determining a priority for each queue (202) within a plurality of ingresses (102), wherein the priority is instantaneous for a given timeslot for data transfer, selecting a queue having a first priority for each group of queues within each ingress (104) having packets destined for a particular egress (104), selecting a queue having a second priority for each subset of queues having first priorities and having packets destined for the particular egress (104), and selecting the queue having the second priority for service across the shared link in the given timeslot.
摘要翻译：一种用于通过共享链路选择用于服务的队列的方法和装置。该方法包括确定多个入口（102）内的每个队列（202）的优先级，其中优先级对于给定的时隙用于数据传输是瞬时的，为每个入口内的每组队列选择具有第一优先级的队列（ 104），具有去往特定出口（104）的分组，为具有第一优先级的队列的每个子集选择具有第二优先级的队列并且具有去往特定出口（104）的分组，以及选择具有服务的第二优先级的队列跨越给定时间段的共享链路。

7. 发明申请

US20060210082A1 Volatile device keys and applications thereof 有权
公开(公告)号：US20060210082A1
公开(公告)日：2006-09-21
申请号：US11273920
申请日：2005-11-14
申请人： Srinivas Devadas , Thomas Ziola
发明人： Srinivas Devadas , Thomas Ziola
IPC分类号： H04L9/00
CPC分类号： H04L9/3278 , G06F21/31 , G06F21/445 , G06F21/602 , G06F21/76 , G06F2221/2129 , G11C7/24 , G11C16/20 , G11C16/22 , G11C2029/4402 , G11C2029/5002 , H04L9/0838 , H04L9/0877 , H04L9/304 , H04L2209/56 , H04L2209/603 , H04L2209/805
摘要： A key is determined from a volatile response using circuitry on the device. The volatile response depend on process variation in fabrication of the device. Error control data that depends on the first volatile response can be computed, stored externally to the device, and then used to generate the key using a volatile response using the circuit. Applications of volatile keys include authentication and rights management for content and software.

8. 发明申请

US20060209584A1 Securely field configurable device 有权
标题翻译：安全的现场可配置设备
公开(公告)号：US20060209584A1
公开(公告)日：2006-09-21
申请号：US11272995
申请日：2005-11-14
申请人： Srinivas Devadas , Thomas Ziola
发明人： Srinivas Devadas , Thomas Ziola
IPC分类号： G11C5/00
CPC分类号： H04L9/3278 , G06F21/31 , G06F21/445 , G06F21/602 , G06F21/76 , G06F2221/2129 , G11C7/24 , G11C16/20 , G11C16/22 , G11C2029/4402 , G11C2029/5002 , H04L9/0838 , H04L9/0877 , H04L9/304 , H04L2209/56 , H04L2209/603 , H04L2209/805
摘要： A field configurable device, such as an FPGA, supports secure field configuration without using non-volatile storage for cryptographic keys on the device and without requiring a continuous or ongoing power source to maintain a volatile storage on the device. The approach can be used to secure the configuration data such that it can in general be used on a single or a selected set of devices and/or encryption of the configuration data so that the encrypted configuration data can be exposed without compromising information encoded in the configuration data.
摘要翻译：诸如FPGA的现场可配置设备支持安全的现场配置，而不需要在设备上使用非易失性存储器用于加密密钥，而不需要连续或正在进行的电源来维护设备上的易失性存储。该方法可以用于保护配置数据，使得其通常可以在单个或所选择的设备集合上使用和/或配置数据的加密，使得加密的配置数据可以在不损害在配置数据。

9. 发明授权

US08782396B2 Authentication with physical unclonable functions 有权
标题翻译：使用物理不可克隆功能进行身份验证
公开(公告)号：US08782396B2
公开(公告)日：2014-07-15
申请号：US12234095
申请日：2008-09-19
申请人： Thomas Ziola , Zdenek Paral , Srinivas Devadas , Gookwon Edward Suh , Vivek Khandelwal
发明人： Thomas Ziola , Zdenek Paral , Srinivas Devadas , Gookwon Edward Suh , Vivek Khandelwal
IPC分类号： H04L9/32
CPC分类号： H04L9/3271 , G06F21/31 , G06F2221/2129 , H04L9/3278 , H04L2209/12 , H04L2209/805 , H04W4/80 , H04W12/06
摘要： Physical Unclonable Functions (PUFs) for authentication can be implemented in a variety of electronic devices including FPGAs, RFIDs, and ASICs. In some implementations, challenge-response pairs corresponding to individual PUFs can be enrolled and used to determine authentication data, which may be managed in a database. Later when a target object with a PUF is intended to be authenticated a set (or subset) of challenges are applied to each PUF device to authenticate it and thus distinguish it from others. In some examples, authentication is achieved without requiring complex cryptography circuitry implemented on the device. Furthermore, an authentication station does not necessarily have to be in communication with an authority holding the authentication data when a particular device is to be authenticated.
摘要翻译：用于认证的物理不可克隆功能（PUF）可以在包括FPGA，RFID和ASIC的各种电子设备中实现。在一些实现中，对应于各个PUF的挑战 - 响应对可以被注册并用于确定可以在数据库中管理的认证数据。之后当具有PUF的目标对象旨在被认证时，将对每个PUF设备应用一组（或子集）的挑战来对其进行认证，从而将其与其他人区分开。在一些示例中，实现认证，而不需要在设备上实现复杂的加密电路。此外，当特定设备要被认证时，认证站不一定必须与保存认证数据的机构进行通信。

10. 发明授权

US08630410B2 Signal generator based device security 有权
标题翻译：基于信号发生器的设备安全
公开(公告)号：US08630410B2
公开(公告)日：2014-01-14
申请号：US11626639
申请日：2007-01-24
申请人： Gookwon Edward Suh , Srinivas Devadas
发明人： Gookwon Edward Suh , Srinivas Devadas
IPC分类号： G06F21/00
CPC分类号： G06F21/31 , G06F21/73 , G06F2221/2129 , H04L9/0866 , H04L2209/12
摘要： Subsets of multiple signal generator circuits embodied in a device are selected, and then a volatile value for the device is generated from the selected subsets. The volatile value may be used for authentication of the device and/or for cryptographic procedures performed on the device. The signal generator circuits may each comprise an oscillator circuit, and the selection of the subsets may be according to a comparison of the outputs of the subsets of circuits, for example, according to a comparison of output oscillation frequencies.
摘要翻译：选择体现在设备中的多个信号发生器电路的子集，然后从所选择的子集产生装置的易失性值。易失性值可以用于设备的认证和/或用于在设备上执行的密码过程。信号发生器电路可以各自包括振荡器电路，并且子集的选择可以根据电路子集的输出的比较，例如根据输出振荡频率的比较。

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