Motorola Mobility LLC

Motorola Corporation

Google Technology Holdings LLC

Ronald F Buskey

Charles Philipp Binzel

Brian David Storm

Douglas A Kuhlman

Barbara B Frosik

Christopher N Kurby

Larry C Puhl

Duane C Rabe

Peter Nanni

Kevin J Bush

David H Hartley

Joseph M Hansen

Joel D Voss

John R Barr

Kevin C Mowry

Michael J Terrington

Apparatus may be provided including a spectrum analyzer and decision circuitry. The spectrum analyzer may be configured to ascertain wireless signal signature data from a wide range of frequency bands. The decision circuitry may be configured to modify operation of one or both of a receiver and a transmitter based on the signal signature data.

Multi-band signal detection

Communication and validation of information transfer from a transmitter to a receiver is achieved by generating a cipher () from a message m () using parameters of an elliptic curve, a generator point P () on the elliptic curve and a public key Q () of the receiver. The cipher includes a first element that is the product kP of a random number k () with the generator point P and a second element that is the product of m and the x-coordinate of the product kQ. The message m is generated from two mathematically independent representations of the information and, optionally, a random number. The cipher is communicated to the receiver and decoded to recover a message m' (). A validation token () is generated by the receiver and passed to the transmitter, which validates communication of the information to the receiver if the product mkQ is equal to the validation token.

Method for elliptic curve public key cryptographic validation

A server, e.g., a client (), receives a request for a digital signature to be applied to digital information, obtains a representation of the information, determines a designation of key pair(s) to be applied thereto; and transmits a request for the digital signature to a front end server (). The front end server determines one or more of whether the client is authentic and authorized, the user identifier is authentic, and the user identifier is permitted to make the request. If so, the front end server transmits a request to generate a digital signature to a back end server (). The back end server determines one or more of whether the front end server is authentic and the designated key pair correspond to the requesting front end server. If so, the back end server generates the digital signature based on the information and the key pair(s).

Distributed digital signature generation

A Multiple Protocol Signal Detector, MPSD () has a mixer () that receives signal energy from a multi-band antenna system () via a low noise amplifier () and from a variable frequency synthesizer () via a first variable band pass filter (). The output of the mixer () passes through a second variable band pass filter () to an envelope detector () a power detector () and a low resolution A/D () that inputs digitized samples to a binary modulation detector, BMD (). A controller () configures the aforementioned devices of the MPSD () to detect communications using different protocols based on a scan Look Up Table ().

Multiple protocol signal detector

A method for distributing content in a communications network including obtaining () encrypted content, for example, from a content provider or from another subscriber terminal, obtaining () a rights object for the content, and in some embodiments obtaining an encrypted token based on the identity of the subscriber terminal obtaining the rights object, maintaining () a relation between the content and identity of the subscriber obtaining the rights object, and tracking () distribution of the content by the subscriber terminal that obtained the rights object in the content.

Digital content acquisition and distribution in digitial rights management enabled communications devices and methods

A method and device for using a partial public key in a cryptosystem. The cryptosystem may be based on a group, such as an elliptic curve over a finite field. The device includes a first memory for storing system parameters of the cryptosystem and a second memory for storing a portion of a public key of the cryptosystem. The device receives the complete public key, or the remainder of the public key, via communication with another device. The received portion of the public key is used to form a validated public key. A processor of the device uses the validated public key for encrypting messages and/or verifying signatures. The size of the second memory is reduced since only part of the public key is stored.

Encryption and verification using partial public key

A method and apparatus authenticates a component () for use in a device (). The device memory () stores a predetermined challenge and a predetermined response () associated with the predetermined challenge. The method detects whether the component has been coupled to the device. If the component has been detected (), the predetermined challenge is provided to the component (). If a component response is received within a predetermined response time (), it is compared to the predetermined response. The component is disabled () if either the component response is not received within the predetermined response time or the component response is received within the predetermined response time but the component response is not equivalent to the predetermined response. The component is enabled () if the component response is received within the predetermined response time and the component response is equivalent to the predetermined response.

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Sleepy Hollow, IL, United States of America

Ronald F Buskey