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Class 380/272 - Including hand-off based cryptographic alteration


Subclass of Class 380 - Cryptography
Definition: Subject matter wherein cryptographic protection is extended
No. of patents: 70
Last issue date: 02/21/2012


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NumberTitleIssue Date
8121293System for ensuring encrypted communication after handover
During connection setup with a first radio access network, a multimode mobile station sends an unprotected initial signaling message that includes information about those encryption algorithms that the multimode mobile station supports when it communications in a se...
02/21/2012
8107629Method of providing security for relay station
A method of providing security of a relay station is disclosed, by which the security can he provided for the relay station in a broadband wireless access system having the relay station. In a mobile communication system to relay a signal transfer between a base sta...
01/31/2012
8019083Method, apparatus and system for key derivation
A method, an apparatus and a system for key derivation are disclosed. The method includes the following steps: a target base station) receives multiple keys derived by a source base station, where the keys correspond to cells under control of the target base station...
09/13/2011
8005224Token-based dynamic key distribution method for roaming environments
A method for establishing a new security association between a mobile node and a network source, the method comprising creating a first token comprising a security association between a network source and a mobile node, the first token being encrypted using a first ...
08/23/2011
7991161System and method for automatic security authentication in wireless networks
A system for automatic security authentication in a wireless network includes a server and a terminal. The terminal includes a processor, a first communications unit, and a second communications unit. The server includes a database, a control unit, and a third commu...
08/02/2011
7936880Method, apparatus and system for key derivation
A method, an apparatus and a system for key derivation are disclosed. The method includes the following steps: a target base station) receives multiple keys derived by a source base station, where the keys correspond to cells under control of the target base station...
05/03/2011
7881475Systems and methods for negotiating security parameters for protecting management frames in wireless networks
Systems and methods provide a mechanism for wireless stations and access points to negotiate security parameters for protecting management frames. The access point and station determine which management frames they are capable of and desire to protect. Data indicati...
02/01/2011
7873165Tactical radio with integrated satcom capability
A multi-band radio having seamless satellite communication capability is provided. The radio includes: a user interface for controlling operations of the radio; an encryption module; a LOS wireless transceiver for transmitting encrypted data at a frequency in the ra...
01/18/2011
7403621System for ensuring encrypted communication after handover
During connection setup with a first radio access network, a multimode mobile station sends an unprotected initial signaling message that includes information about those encryption algorithms that the multimode mobile station supports when it communicates in a seco...
07/22/2008
7400731Scalable technique for ensuring real-time, end-to-end security in a multimedia mobile network
A method for handing off a connection of a mobile device from a primary VPN to which the mobile device is connected to an angel VPN to which the mobile device may be connected in an Internet Protocol-based multimedia mobile network includes the steps of searching fo...
07/15/2008
7380124Security transmission protocol for a mobility IP network
The present invention supports a secure transmissions protocol for information packet transmission between a Mobile Node and a Foreign Agent. The information packets are encrypted and decrypted using an integrated software client that combines mobile IP communicatio...
05/27/2008
7369661Method and apparatus for detection of loss of cipher synchronization
Detecting loss of stream cipher synchronization between a transmitter and a receiver in a video processing system may be achieved by receiving, by the receiver, an encrypted video frame from the transmitter, obtaining an encrypted value for a selected pixel in the ...
05/06/2008
7362866Method for determining encryption algorithm of secret communication based on mobile country codes
The present invention discloses a method for determining encryption algorithm used in security communication based on Mobile Country Code (MCC) number. In this method, a Mobile Country Code (MCC) number list is preset in a Core Network (CN), and all the MCC numbers ...
04/22/2008
7319756Audio coding
Coding of an audio signal (x) is provided where the coded bitstream (AS) comprises a parametric representation of the audio signal. One component of the parametric representation comprises tracks of linked sinusoidal components (CS) where subsequently linked compone...
01/15/2008
7310529Packet data traffic control for cellular wireless networks
Data traffic over a plurality of data communications links of a wireless data communications system is controlled by identifying a poorly performing wireless link, and interrupting data communications over the poorly performing link. The data throughput of remaining...
12/18/2007
7308104Forward multiple scrambling code generating method and apparatus
Disclosed are a forward multiple scrambling code generating method and apparatus in a communication system. Each base station uses primary scrambling codes and an associated one of secondary scrambling code sets, each consisting of a plurality of secondary scramblin...
12/11/2007
7298849Method and apparatus for simultaneous encryption and decryption of publicly distributed media
The present invention provides secure communication from one encryption domain to another using a trusted module. In one embodiment, the invention includes generating a cipher stream based on a first key for encrypted streamed content, and generating a second cipher...
11/20/2007
7289630Counter initialization, particularly for radio frames
A method for protecting traffic in a radio access network connected to at least two core networks. The method includes maintaining a core-network-specific authentication protocol and a radio-bearer-specific ciphering process, and generating, for each ciphering proce...
10/30/2007
7275157Facilitating 802.11 roaming by pre-establishing session keys
A method and system for pre-authenticating a pre-establishing key management on a roaming device prior to reassociation to facilitate fast hand-off in a wireless network is described. For enhanced mobility, both authentication and key establishment is performed prio...
09/25/2007
7269448Method for recognizing request for data transmission by mobile/base station RRC using network transfer device
A method recognizes a request for data transmission by a mobile/base station RRC (Radio Resource Control) using a network transfer device, by which the mobile/base station RRC can recognize the request for data transmission using the network transfer device in a sta...
09/11/2007
7242938Mobile assisted handoff system and method
A system and method for improved mobile assisted handoff in a digital cellular communication system that gives the mobile station the ability to synchronize to candidate base station transmissions in order to read the transmitted digital voice color code (DVCC) of t...
07/10/2007
7230939Home network using wireless module
Methods and apparatus for implementing a home network including a wireless module. In one implementation, a home network includes: two or more host devices, where at least one host device includes a wireless module port, and where the host devices are connected in a...
06/12/2007
7224801Wireless secure device
A method and apparatus for securely connecting one or more wireless peripheral devices such as keyboards, mice, gamepads, remote controllers, joysticks and one or more host systems such as personal computers or workstations, the secure connection reducing the vulner...
05/29/2007
7221764Security key distribution using key rollover strategies for wireless networks
Security key distribution techniques using key rollover strategies for wireless networks are described. A number of keys are generated, usually by an access point. The present invention allows a standard mode and a mixed mode. In standard mode, each device on the ne...
05/22/2007
7203318Secure transmission system for a digital trunked radio system
A security system for a digital trunked radio system having a digital control channel and a plurality of working channels, wherein said working channels are assigned for temporary use of individual radio units by digital control signals transmitted over said control...
04/10/2007
7184554Wireless device management
A method of managing a wireless device (2), the method comprising installing a management agent program in a memory of the wireless device (2), the installed management agent monitoring the status of application programs installed on the device. Manage...
02/27/2007
7158777Authentication method for fast handover in a wireless local area network
Disclosed is a method for authenticating a mobile node in a wireless local area network including at least two access points and an authentication server. When the mobile node associates with a first access point and performs initial authentication, the mobile node ...
01/02/2007
7158641Recorder
A memory card (110) decodes data delivered to a data bus (BS3) and extracts a session key (Ks1) sent from a server from the data. Based on the session key (Ks1), an encrypting section (1406) encrypts a public encryption key (KPm (
01/02/2007
7158640Method and apparatus for re-synchronization of a stream cipher during handoff
A method and apparatus for re-synchronizing a stream cipher during soft handoff. Transmitted quasi-secret keying information is used with a secret key to reinitialize a stream cipher generator located in a base station and a stream cipher generator located in a trav...
01/02/2007
7155607Method for authentication between apparatuses using challenge and response system
An object of the present invention is to provide a technology to improve security against spoofing in a method of authentication using a challenge and response system. In the method of authentication of the present invention, the piece of challenge data is tr...
12/26/2006
7127742Establishing a secure connection with a private corporate network over a public network
An external client securely accesses a private corporate network using a communications device, but without the communications device being required to communicate through the private corporate network when communicating with resources external to the private corpor...
10/24/2006
7123719Method and apparatus for providing authentication in a communication system
A method includes receiving an authentication request from a mobile station (401) and determining whether to forward the request to an authentication agent. When it is determined to forward the request, the request is forwarded to the authentication agent (
10/17/2006
7116738Data synchronization apparatus and method
Disclosed is a method and apparatus for synchronizing data. In one embodiment, the apparatus includes a first communication link for transmitting first data and a second communication link for transmitting second data. A circuit coupled to the first and second commu...
10/03/2006
7113600Base transceiver station automatic encryption handling
A system and method for automatically selecting an encryption, or ciphering, algorithm in a cellular communication network is disclosed. A cellular communication network includes a Base Transceiver Station (BTS) connected to a Base Station Controller (BSC), which is...
09/26/2006
7082200Establishing secure peer networking in trust webs on open networks using shared secret device key
A trust web keying process provides secure peer networking of computing devices on an open network. A device is initially keyed at distribution to an end user or installer with a device-specific cryptographic key, and programmed to respond only to peer networking co...
07/25/2006
7079655Encryption algorithm management system
An encryption algorithm management system has a terminal unit and a center unit that have a common cipher-key to a ciphered encryption algorithm. The terminal unit includes a transmitter configured to transmit a demand to the center unit for obtaining an encrypted d...
07/18/2006
7065359System and method for switching between base stations in a wireless communications system
A base station switching system includes a wireless unit that waits before switching from a previous base station to a new base station after the wireless unit has indicated to the wireless communications system the identity of the new base station. Thus, the wirele...
06/20/2006
7050947Remote control communication including secure synchronization
A remote communication system (20) includes a signaling device (24) and a remotely located controller (26). The signaling device (24) includes a synchronization counter (44) and the controller includes a synchronization counter (
05/23/2006
7047405Method and apparatus for providing secure processing and data storage for a wireless communication device
Techniques for providing secure processing and data storage for a wireless communication device. In one specific design, a remote terminal includes a data processing unit, a main processor, and a secure unit. The data processing unit processes data for a communicati...
05/16/2006
7043243Mobile assisted handoff system and method
A system and method for improved mobile assisted handoff in a digital cellular communication system that gives the mobile station the ability to synchronize to candidate base station transmissions in order to read the transmitted digital voice color code (DVCC) of t...
05/09/2006
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