Riendeau
Jean-Francios Riendeau, Santa Clara, CA US
Patent application number | Description | Published |
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20080279372 | Secure distribution of content using decryption keys - For digital rights management (DRM) of e.g. digitally delivered music or video, a technique to make the decryption keys more secure. The technique fragments a message (song or video or other) into a number of portions, and uses a different decryption key for each portion. Each of the various keys is a function of the preceding key, in one version. In another version, each key is a function of a seed value and of the particular portion of the material with which the key is associated. | 11-13-2008 |
Jean-Francois Riendeau, Cupertino, CA US
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20130003977 | DEVICE-INDEPENDENT MANAGEMENT OF CRYPTOGRAPHIC INFORMATION - Some embodiments provide an account-based DRM system for distributing content. The system includes several devices that are associated with an account and a set of DRM computers that receives a request to access a piece of content on the devices associated with the account. The DRM computer set then generates a several keys for the devices, where each particular key of each particular device allows the particular device to access the piece of content on the particular device. In some embodiments, the DRM computer set sends the content and keys to one device (e.g., a computer), which is used to distribute the content and the key(s) to the other devices associated with the account. In some embodiments, the DRM computer set individually encrypts each key in a format that is used during its transport to its associated device and during its use on this device. | 01-03-2013 |
Marcel Riendeau, Lich DE
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20130269906 | HEAT EXCHANGER ELEMENT AND METHOD FOR THE PRODUCTION - To provide heat exchanger elements which allow the creation of Enthalpy exchangers whereby the efficiency of sensible energy exchange and latent energy exchange can be varied and controlled and especially improved, a method for the production of heat exchanger elements is provided including | 10-17-2013 |
Mathieu Riendeau, Saint-Constant CA
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20130100667 | LIGHT BEACON - The present disclosure relates to a light beacon. The light beacon comprises a casing and a plurality of light units. Each light unit is disposed along a periphery of the casing. Each light unit comprises a back reflector, two parallel side reflectors and at least one light emitting diode. The back reflector has at least a section defining a parabolic shape. The two parallel side reflectors face each other on opposite sides of the back reflector. The at least one light emitting diode (LED) is positioned about a focal point of the section defining a parabolic shape of the back reflector. The position of the at least one LED with respect to the back reflector determines an angle of projected light beam by the light unit. | 04-25-2013 |
Melanie Riendeau, Cupertino, CA US
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20130067211 | OPERATIONAL MODE FOR BLOCK CIPHERS - In the field of computer enabled cryptography, such as a keyed block cipher having a plurality of sequenced rounds, the cipher is hardened against attack by a protection process. The protection process uses block lengths that are larger or smaller than and not an integer multiple of those of an associated standard cipher, and without using message padding. This is operative in conjunction with standard block ciphers such as the AES, DES or triple DES ciphers, and also with various block cipher cryptographic modes such as CBC or EBC. | 03-14-2013 |
20130145167 | Optimized Integrity Verification Procedures - Some embodiments of the invention provide a method of verifying the integrity of digital content. At a source of the digital content, the method generates a signature for the digital content by applying a hashing function to a particular portion of the digital content, where the particular portion is less than the entire digital content. The method supplies the signature and the digital content to a device. At the device, the method applies the hashing function to the particular portion of the digital content in order to verify the supplied signature, and thereby verifies the integrity of the supplied digital content. | 06-06-2013 |
Sylvain Riendeau, Varennes CA
Patent application number | Description | Published |
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20130018620 | Method And System For Time Synchronization Of Phase Of Signals From Respective Measurement Devices - According to the invention, a time synchronization of phase between measurement devices that do not share a same clock for their respective sampling of the signals is carried out by a time tagging of samples of the signals in time blocks followed by an adjustment of the phase values of components of interest of the signals in the regrouped time blocks so that the values refer to common time references between the measurement devices. The tagging is carried out with a synchronization signal available to the measurement devices, completed with count values provided by a counter operated by a reference clock for each measurement device. | 01-17-2013 |