Patents by Inventor Sylvain Prevost
Sylvain Prevost has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10042990Abstract: Atomically modifying a personal security device includes presenting the personal security device to a reader/writer coupled to an access module, the access module determining if the personal security device includes a factory security mechanism, and, if the personal security device includes a factory security mechanism, using the reader/writer and the access module to replace the factory security mechanism with another security mechanism. The access module may authenticate the personal security device in connection with replacing the factory security mechanism. Authenticating the personal security device may grant access to a user through a door controlled by the access module. Replacing the factory security mechanism may include replacing an application on the personal security device. An ISO/IEC 7816-13 application management request command may be used to replace the application.Type: GrantFiled: March 26, 2013Date of Patent: August 7, 2018Assignee: Assa Abloy ABInventors: Kapil Sachdeva, Philip Hoyer, Eric F. Le Saint, Sylvain Prevost
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Patent number: 9979540Abstract: A storage device contains a smart-card device and a memory device, both connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions. One of these partitions may be a read-only partition that is normally accessible only for read accesses. However, it may sometimes be necessary to update or supplement the data stored in the read-only partition. This is accomplished by a host issuing an appropriate command to the storage device, which may be accompanied by an identifier for an appropriate level of authorization. The controller then changes the attribute of the read-only partition from “read-only” to “read/write” to allow data to be written to the partition. Upon completion, the controller changes the attribute of the partition back to read-only.Type: GrantFiled: June 12, 2015Date of Patent: May 22, 2018Assignee: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Patent number: 9483632Abstract: A storage device contains a smart-card device and a memory device, both of which are accessed though a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions corresponding to the protection level of the data stored therein. The smart-card device stores critical security parameters that are provided to the controller to protect access to some or all of the partitions of the memory device. A host connected to the controller issues commands, and the controller analyzes the commands and responds to them in various ways depending upon the nature of the command. In particular, depending upon the nature of the command, the controller may either pass the command to the smart-card device, or ignore the command either indefinitely or until a predetermined event has occurred.Type: GrantFiled: July 21, 2015Date of Patent: November 1, 2016Assignee: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Patent number: 9413535Abstract: A storage device contains a smart-card device and a memory device, which is connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data. The memory device may also be used to store data or instructions for use by the smart-card device. The controller includes a security engine that uses critical security parameters stored in, and received from, the smart-card device. The critical security parameters may be sent to the controller in a manner that protects them from being discovered. The critical security parameters may be encryption and/or decryption keys that may encrypt data written to the memory device and/or decrypt data read from the memory device, respectively. Data and instructions used by the smart-card device may therefore stored in the memory device in encrypted form.Type: GrantFiled: January 5, 2015Date of Patent: August 9, 2016Assignee: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Publication number: 20160026836Abstract: Readers are associated with a number of access credentials and, once authenticated by the reader, may grant the holder of the access credential access to a secured asset. Readers may become the target of attack, such as when an unauthorized party attempts to gain access to the interior of the reader or removes the reader from an installed location. Once removed the reader may be reinstalled in another location or a counterfeit reader used in its place. By providing a paired tamper credential, the reader may deny otherwise authorized access to the secured asset if the tamper credential fails to respond appropriately. The tamper credential may fail to respond due to distance, such as when the reader alone is relocated, or the tamper credential is damaged, such as during an attempt to gain access the interior of the reader and/or remove the reader from its installed location.Type: ApplicationFiled: March 14, 2014Publication date: January 28, 2016Inventors: Randall Dennis BOUSFIELD, Sylvain PREVOST, Michael Lawrence DAVIS, David Andrew ANDRESKY, Toby Mark PADILLA
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Publication number: 20150324575Abstract: A storage device contains a smart-card device and a memory device, both of which are accessed though a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions corresponding to the protection level of the data stored therein. The smart-card device stores critical security parameters that are provided to the controller to protect access to some or all of the partitions of the memory device. A host connected to the controller issues commands, and the controller analyzes the commands and responds to them in various ways depending upon the nature of the command. In particular, depending upon the nature of the command, the controller may either pass the command to the smart-card device, or ignore the command either indefinitely or until a predetermined event has occurred.Type: ApplicationFiled: July 21, 2015Publication date: November 12, 2015Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Publication number: 20150280912Abstract: A storage device contains a smart-card device and a memory device, both connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions. One of these partitions may be a read-only partition that is normally accessible only for read accesses. However, it may sometimes be necessary to update or supplement the data stored in the read-only partition. This is accomplished by a host issuing an appropriate command to the storage device, which may be accompanied by an identifier for an appropriate level of authorization. The controller then changes the attribute of the read-only partition from “read-only” to “read/write” to allow data to be written to the partition. Upon completion, the controller changes the attribute of the partition back to read-only.Type: ApplicationFiled: June 12, 2015Publication date: October 1, 2015Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Patent number: 9111045Abstract: A storage device contains a smart-card device and a memory device, both of which are accessed though a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions corresponding to the protection level of the data stored therein. The smart-card device stores critical security parameters that are provided to the controller to protect access to some or all of the partitions of the memory device. A host connected to the controller issues commands, and the controller analyzes the commands and responds to them in various ways depending upon the nature of the command. In particular, depending upon the nature of the command, the controller may either pass the command to the smart-card device, or ignore the command either indefinitely or until a predetermined event has occurred.Type: GrantFiled: April 16, 2012Date of Patent: August 18, 2015Assignee: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Patent number: 9088418Abstract: A storage device contains a smart-card device and a memory device, both connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may he used to store a relatively large amount of data in various partitions. One of these partitions may be a read-only partition that is normally accessible only for read accesses. However, it may sometimes be necessary to update or supplement the data stored in the read-only partition. This is accomplished by a host issuing an appropriate command to the storage device, which may he accompanied by an identifier for an appropriate level of authorization. The controller then changes the attribute of the read-only partition from “read-only” to “read/write” to allow data to be written to the partition. Upon completion, the controller changes the attribute of the partition back to read-only.Type: GrantFiled: April 18, 2014Date of Patent: July 21, 2015Assignee: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Publication number: 20150156022Abstract: A storage device contains a smart-card device and a memory device, which is connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data. The memory device may also be used to store data or instructions for use by the smart-card device. The controller includes a security engine that uses critical security parameters stored in, and received from, the smart-card device. The critical security parameters may be sent to the controller in a manner that protects them from being discovered. The critical security parameters may be encryption and/or decryption keys that may encrypt data written to the memory device and/or decrypt data read from the memory device, respectively. Data and instructions used by the smart-card device may therefore stored in the memory device in encrypted form.Type: ApplicationFiled: January 5, 2015Publication date: June 4, 2015Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Publication number: 20150047023Abstract: Atomically modifying a personal security device includes presenting the personal security device to a reader/writer coupled to an access module, the access module determining if the personal security device includes a factory security mechanism, and, if the personal security device includes a factory security mechanism, using the reader/writer and the access module to replace the factory security mechanism with another security mechanism. The access module may authenticate the personal security device in connection with replacing the factory security mechanism. Authenticating the personal security device may grant access to a user through a door controlled by the access module. Replacing the factory security mechanism may include replacing an application on the personal security device. An ISO/IEC 7816-13 application management request command may be used to replace the application.Type: ApplicationFiled: March 26, 2013Publication date: February 12, 2015Inventors: Kapil Sachdeva, Philip Hoyer, Eric F. Le Saint, Sylvain Prevost
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Patent number: 8930711Abstract: A storage device contains a smart-card device and a memory device, which is connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data. The memory device may also be used to store data or instructions for use by the smart-card device. The controller includes a security engine that uses critical security parameters stored in, and received from, the smart-card device. The critical security parameters may be sent to the controller in a manner that protects them from being discovered. The critical security parameters may be encryption and/or decryption keys that may encrypt data written to the memory device and/or decrypt data read from the memory device, respectively. Data and instructions used by the smart-card device may therefore stored in the memory device in encrypted form.Type: GrantFiled: April 2, 2012Date of Patent: January 6, 2015Assignee: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Patent number: 8898477Abstract: A system and method of operating a device to securely update the control firmware controlling the device. Downloading a firmware update package to a first microcontroller of the device. Determining a firmware update portion and an encrypted hash portion of the firmware update package wherein the encrypted hash portion is cryptographically signed by a signatory. Confirm that the encrypted hash portion conforms to the firmware update by independently computing the hash of the encrypted firmware update portion on the first microcontroller and comparing that value to the signed hash. Other systems and methods are disclosed.Type: GrantFiled: November 12, 2007Date of Patent: November 25, 2014Assignee: Gemalto Inc.Inventors: Sylvain Prevost, Ksheerabdhi Krishna, Ruchirkumar D Shah, Mehdi Asnaashari
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Publication number: 20140229745Abstract: A storage device contains a smart-card device and a memory device, both connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may he used to store a relatively large amount of data in various partitions. One of these partitions may be a read-only partition that is normally accessible only for read accesses. However, it may sometimes be necessary to update or supplement the data stored in the read-only partition. This is accomplished by a host issuing an appropriate command to the storage device, which may he accompanied by an identifier for an appropriate level of authorization. The controller then changes the attribute of the read-only partition from “read-only” to “read/write” to allow data to be written to the partition. Upon completion, the controller changes the attribute of the partition back to read-only.Type: ApplicationFiled: April 18, 2014Publication date: August 14, 2014Applicant: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Patent number: 8799932Abstract: In general, the invention relates to a converter. The converter includes logic for reading annotations in a source program, where the annotations provide a mapping between method names for methods invoked using messages in a legacy protocol and a native protocol. The converter further includes logic for creating a mapping data structure using the annotations to provide a mapping between method invoking instructions in the legacy protocol and method invoking instructions in the native protocol.Type: GrantFiled: July 21, 2006Date of Patent: August 5, 2014Assignee: Gemalto SAInventor: Sylvain Prevost
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Patent number: 8746578Abstract: A storage device contains a smart-card device and a memory device, both connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions. One of these partitions may be a read-only partition that is normally accessible only for read accesses. However, it may sometimes be necessary to update or supplement the data stored in the read-only partition. This is accomplished by a host issuing an appropriate command to the storage device, which may be accompanied by an identifier for an appropriate level of authorization. The controller then changes the attribute of the read-only partition from “read-only” to “read/write” to allow data to be written to the partition. Upon completion, the controller changes the attribute of the partition back to read-only.Type: GrantFiled: September 11, 2012Date of Patent: June 10, 2014Assignee: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Publication number: 20130010519Abstract: A storage device contains a smart-card device and a memory device, both connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions. One of these partitions may be a read-only partition that is normally accessible only for read accesses. However, it may sometimes be necessary to update or supplement the data stored in the read-only partition. This is accomplished by a host issuing an appropriate command to the storage device, which may be accompanied by an identifier for an appropriate level of authorization. The controller then changes the attribute of the read-only partition from “read-only” to “read/write” to allow data to be written to the partition. Upon completion, the controller changes the attribute of the partition back to read-only.Type: ApplicationFiled: September 11, 2012Publication date: January 10, 2013Applicant: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Patent number: 8307131Abstract: A system and method to control a device having at least one configurable parameter. Enumerating the device as a first peripheral device and as a second peripheral device wherein the first peripheral device corresponds to a first microcontroller connected to a storage medium and the second peripheral device corresponds to a second microcontroller. Controlling the at least one configurable parameter of the first microcontroller with respect to the storage medium by the second microcontroller. On initialization of the device, transmitting the at least one configurable parameter from the second microcontroller to the first microcontroller. Other systems and methods are disclosed.Type: GrantFiled: November 12, 2007Date of Patent: November 6, 2012Assignee: Gemalto SAInventors: Sylvain Prevost, Ksheerabdhi Krishna, Ruchirkumar D Shah, Mehdi Asnaashari
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Patent number: 8286883Abstract: A storage device contains a smart-card device and a memory device, both connected to a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions. One of these partitions may be a read-only partition that is normally accessible only for read accesses. However, it may sometimes be necessary to update or supplement the data stored in the read-only partition. This is accomplished by a host issuing an appropriate command to the storage device, which may be accompanied by an identifier for an appropriate level of authorization. The controller then changes the attribute of the read-only partition from “read-only” to “read/write” to allow data to be written to the partition. Upon completion, the controller changes the attribute of the partition back to read-only.Type: GrantFiled: November 12, 2007Date of Patent: October 16, 2012Assignee: Micron Technology, Inc.Inventors: Medhi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna
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Publication number: 20120204018Abstract: A storage device contains a smart-card device and a memory device, both of which are accessed though a controller. The storage device may be used in the same manner as a conventional smart-card device, or it may be used to store a relatively large amount of data in various partitions corresponding to the protection level of the data stored therein. The smart-card device stores critical security parameters that are provided to the controller to protect access to some or all of the partitions of the memory device. A host connected to the controller issues commands, and the controller analyzes the commands and responds to them in various ways depending upon the nature of the command. In particular, depending upon the nature of the command, the controller may either pass the command to the smart-card device, or ignore the command either indefinitely or until a predetermined event has occurred.Type: ApplicationFiled: April 16, 2012Publication date: August 9, 2012Applicant: Micron Technology, Inc.Inventors: Mehdi Asnaashari, Ruchirkumar D. Shah, Sylvain Prevost, Ksheerabdhi Krishna