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公开(公告)号：US11341837B1
公开(公告)日：2022-05-24
申请号：US17134729
申请日：2020-12-28
申请人： Impinj, Inc.
发明人： Christopher J. Diorio , Harley Heinrich , Matthew Robshaw , Theron Stanford , Charles J. T. Peach , John D. Hyde , Tan Mau Wu
摘要： RFID ICs sense and indicate changes in their surrounding environment, such as changes in temperature, humidity, chemical presence, RF signals, and similar. An RFID IC indicates when a significant environmental change has occurred, for example by adjusting the value of a flag, writing data to memory, transmitting a message to an external entity, exiting a sleep state, and/or responding repeatedly to an inventorying reader. In some cases, RFID IC actively notifies an external entity that a significant environmental change has been sensed. For example, RFID IC may alert the external entity by participating in a special inventory process meant for RFID ICs sending environmental change. The RFID IC may alert the external entity by interjecting itself into an inventory round, re-participating in an inventory round, refraining from entering a sleep state after inventorying, and/or adjusting timing of a scheduled reply to communicate with an RFID reader ahead of schedule.
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公开(公告)号：US10713453B1
公开(公告)日：2020-07-14
申请号：US16229171
申请日：2018-12-21
申请人： Impinj, Inc.
摘要： A Radio Frequency Identification (RFID) system including an RFID reader and a reader proxy authenticates itself to a verification authority. The proxy receives a proxy challenge from a verification authority and determines a proxy response based on the proxy challenge and a proxy key known to the proxy. The proxy response is then sent to the verification authority along with an identifier for the reader. The reader then authenticates an RFID tag by sending a tag response to the verification authority, which determines whether the reader is authentic based on the authenticity of the proxy response.
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公开(公告)号：US10699178B1
公开(公告)日：2020-06-30
申请号：US16137568
申请日：2018-09-21
申请人： Impinj, Inc.
IPC分类号： G06K19/073 , G06K7/10 , G06K19/077
摘要： RFID technology may be used to provide digital identities for physical items. An RFID IC attached to or integrated into a physical item contains an identifier for the physical item. Digital identity information associated with the item, such as ownership information, history, properties, and the like, may be located on one or more networks. An entity, after authenticating itself and/or the item, may use the identifier to locate, retrieve, and/or update the item's digital identity information on the network.
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公开(公告)号：US09887843B1
公开(公告)日：2018-02-06
申请号：US15387156
申请日：2016-12-21
申请人： Impinj, Inc.
IPC分类号： H04L9/14 , G06Q30/00 , H04L12/04 , H04L29/06 , H04W12/06 , H04L9/08 , H04L9/30 , G06K7/10 , H04L9/06 , H04W12/04
CPC分类号： H04L9/14 , G06K7/10257 , G06K19/073 , G06Q30/00 , H04L9/0643 , H04L9/0877 , H04L9/30 , H04L9/3271 , H04L63/06 , H04L63/083 , H04L2209/805 , H04W12/04 , H04W12/06
摘要： A cryptographically-enabled RFID tag stores a primary secret key and derives secondary keys from the primary key. A secondary key may be derived by combining the primary key with one or more other parameters using one or more algorithms. The tag uses a derived secondary key to encrypt or electronically sign a tag response sent to a verifying entity. The verifying entity does not know the derived secondary key, but knows the tag primary key and the parameters and algorithms used to derive the secondary key and can derive all of the potential secondary keys. The verifying entity can then attempt to authenticate the tag or tag response by trying potential secondary keys.
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公开(公告)号：US12086668B1
公开(公告)日：2024-09-10
申请号：US18316311
申请日：2023-05-12
申请人： Impinj, Inc.
CPC分类号： G06K19/0723 , G06K17/0029 , H04L9/0861 , H04L9/3226
摘要： A method is provided to determine unique identifiers. A physical item has an RFID integrated circuit (IC) having a unique identifier and a secret. The RFID IC may be configured to provide an identifier portion and a response to a previously sent challenge, where the identifier portion by itself is insufficient to completely identify the IC or item and the response is based on the challenge and the secret. Attempts are made to verify the response using a set of potential secrets determined using the identifier portion. If the response is successfully verified using a certain secret, the secret may then be used to determine one or more other identifier portions. The unique, complete identifier may then be determined from a combination of at least the identifier portions.
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公开(公告)号：US11798392B1
公开(公告)日：2023-10-24
申请号：US17749292
申请日：2022-05-20
申请人： Impinj, Inc.
发明人： Christopher J. Diorio , Harley Heinrich , Matthew Robshaw , Theron Stanford , Charles J. T. Peach , John D. Hyde , Tan Mau Wu
CPC分类号： G08B21/182 , G06K7/10366 , G06K19/0723
摘要： RFID ICs sense and indicate changes in their surrounding environment, such as changes in temperature, humidity, chemical presence, RF signals, and similar. An RFID IC indicates when a significant environmental change has occurred, for example by adjusting the value of a flag, writing data to memory, transmitting a message to an external entity, exiting a sleep state, and/or responding repeatedly to an inventorying reader. In some cases, RFID IC actively notifies an external entity that a significant environmental change has been sensed. For example, RFID IC may alert the external entity by participating in a special inventory process meant for RFID ICs sending environmental change. The RFID IC may alert the external entity by interjecting itself into an inventory round, re-participating in an inventory round, refraining from entering a sleep state after inventorying, and/or adjusting timing of a scheduled reply to communicate with an RFID reader ahead of schedule.
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公开(公告)号：US11361174B1
公开(公告)日：2022-06-14
申请号：US16871101
申请日：2020-05-11
申请人： Impinj, Inc.
摘要： An authentication method includes RFID tags authenticating RFID readers. A tag sends a tag identifier and a reader challenge to a reader in response to one or more commands from the reader. The reader then either derives a response to the reader challenge itself or has a verification authority derive the response. The response may be derived from parameter(s) in the reader challenge, and may be derived using a cryptographic key. The reader then sends the response to the tag along with one or more commands. The tag verifies the response before executing action(s) associated with the command(s).
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公开(公告)号：US10719671B1
公开(公告)日：2020-07-21
申请号：US16035777
申请日：2018-07-16
申请人： Impinj, Inc.
发明人： Matthew Robshaw , Tan Mau Wu
摘要： Messages may be passed between Radio Frequency Identification (RFID) tags using RFID readers. A first tag with a message intended for a second tag sends the message to an RFID reader. The reader then determines that the destination of the message is the second tag and sends the message to the second tag. The second tag may confirm receipt of the message by sending a receipt confirmation message to the reader for forwarding to the first tag, and/or the reader may itself confirm that the message was sent to the second tag by sending a transmit confirmation message to the first tag.
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公开(公告)号：US09940490B1
公开(公告)日：2018-04-10
申请号：US14106522
申请日：2013-12-13
申请人： Impinj, Inc.
发明人： Matthew Robshaw , Harley Heinrich , Yael Maguire , Theron Stanford , Christopher J. Diorio , Scott A. Cooper
CPC分类号： G06K7/10257 , H04L9/3263 , H04L9/3273 , H04L2209/805
摘要： An authentication method includes RFID tags authenticating RFID readers. A tag sends a tag identifier and a reader challenge to a reader in response to one or more commands from the reader. The reader then either derives a response to the reader challenge itself or has a verification authority derive the response. The response may be derived from parameter(s) in the reader challenge, and may be derived using a cryptographic key. The reader then sends the response to the tag along with another command. The tag verifies the response before executing instruction(s) included in the command.
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公开(公告)号：US09565022B1
公开(公告)日：2017-02-07
申请号：US14318367
申请日：2014-06-27
申请人： Impinj, Inc.
CPC分类号： H04L9/14 , G06K7/10257 , G06K19/073 , G06Q30/00 , H04L9/0643 , H04L9/0877 , H04L9/30 , H04L9/3271 , H04L63/06 , H04L63/083 , H04L2209/805 , H04W12/04 , H04W12/06
摘要： A cryptographically-enabled RFID tag stores a primary secret key and derives secondary keys from the primary key. A secondary key may be derived by combining the primary key with one or more other parameters using one or more algorithms. The tag uses a derived secondary key to encrypt or electronically sign a tag response sent to a verifying entity. The verifying entity does not know the derived secondary key, but knows the tag primary key and the parameters and algorithms used to derive the secondary key and can derive all of the potential secondary keys. The verifying entity can then attempt to authenticate the tag or tag response by trying potential secondary keys.
摘要翻译： 启用加密功能的RFID标签存储主密钥，并从主键导出辅助密钥。 可以通过使用一个或多个算法将主键与一个或多个其他参数组合来导出次要键。 标签使用派生的次要密钥来加密或电子签名发送到验证实体的标签响应。 验证实体不知道派生的辅助密钥，而是知道标签主键以及用于导出辅助密钥的参数和算法，并且可以导出所有潜在的辅助密钥。 然后，验证实体可以尝试通过尝试潜在的次要密钥来验证标签或标签响应。
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