Abstract: Methods are provided for securely transmitting a packet between endpoints of a network. In one aspect, there is provided a method for establishing an end-to-end key using extant hop-by-hop security associations. In a second aspect, there is provided a method in which a packet-specific encryption key PEK is used to encrypt a packet p. A signature of the key PEK is independently computed at each of two nodes, using an integrity key shared by the two nodes. The signature is sent from one of the two nodes to the other in association with the packet p. The receiving node uses the signature to verify that the packet p was originated by an entity having possession of the PEK.

Abstract: The present invention provides a method involving a femtocell in communication with an Internet Protocol Multimedia Subsystem (IMS) network. In one embodiment, the femtocell operates according to code division multiple access (CDMA) standards. The method includes receiving, from the femtocell and at a first secure entity in the IMS network, first authentication information generated by the mobile unit using a first random number broadcast by the femtocell in a global challenge. The method also includes receiving, from a second secure entity in the secure network, at least one security key formed based on the global challenge and second authentication information for uniquely challenging the mobile unit. In one embodiment, the second secure entity is a CDMA-based authentication server. The method further includes providing the security key(s) to the femtocell in response to authenticating the mobile unit based upon the second authentication information.

Abstract: In one embodiment, the method performed by mobile equipment to authenticate communication with a network includes generating keys using cellular authentication and voice encryption, and then generating an authentication key based on these keys. The authentication key is used to generate an expected message authentication code used in authenticating the network according to authentication and key agreement security protocol.

Abstract: The present invention provides a method for encrypting data for transmission over a wireless link. The method includes encrypting at least one block of data, at an air-interface application layer, using an encryption algorithm that receives a cryptosynch as input. The value of the cryptosynch is based on an order of the at least one block of data relative to other blocks of data. The value of the cryptosynch is recoverable by a receiver based on the ordering of the ordering of the blocks of data. The at least one encrypted block of data is transmitted to a receiver that is operable to preserve the order of the at least one block of data relative to the other blocks of data.

Abstract: The present invention provides a method involving a femtocell in communication with an Internet Protocol Multimedia Subsystem (IMS) network. In one embodiment, the femtocell operates according to code division multiple access (CDMA) standards. The method includes receiving, from the femtocell and at a first secure entity in the IMS network, first authentication information generated by the mobile unit using a first random number broadcast by the femtocell in a global challenge. The method also includes receiving, from a second secure entity in the secure network, at least one security key formed based on the global challenge and second authentication information for uniquely challenging the mobile unit. In one embodiment, the second secure entity is a CDMA-based authentication server. The method further includes providing the security key(s) to the femtocell in response to authenticating the mobile unit based upon the second authentication information.

Abstract: In one embodiment, the method performed by mobile equipment to authenticate communication with a network includes generating keys using cellular authentication and voice encryption, and then generating an authentication key based on these keys. The authentication key is used to generate an expected message authentication code used in authenticating the network according to authentication and key agreement security protocol.

Abstract: Methods and systems are provided for securing integrated base stations, such as base station routers (BSRs), in which a SIM card is operatively coupled with a secured portion of a base station and a secure association is established therebetween to facilitate encryption key exchange between the secured portion of the base station and a core network.

Abstract: Described is a method by mobile equipment to communicate with a network. The method includes receiving a network authentication token having a first message authentication code, an authentication message field and a first extended sequence number that includes a first hardware identifier and first sequence number, and authenticating the network based on the first message authentication code, the first hardware identifier, and the first sequence number.

Abstract: Methods and systems are provided for securing integrated base stations, such as base station routers (BSRs), in which a SIM card is operatively coupled with a secured portion of a base station and a secure association is established therebetween to facilitate encryption key exchange between the secured portion of the base station and a core network.

Abstract: Methods and systems are provided for securing integrated base stations, such as base station routers (BSRs), in which a SIM card is operatively coupled with a secured portion of a base station and a secure association is established therebetween to facilitate encryption key exchange between the secured portion of the base station and a core network.

Abstract: A method for wireless communications with mobile stations located within a femtocell is described. The method includes registering a femtocell with an IMS core network to receive IMS services for one or more mobile stations located within the femtocell, and separately registering the mobile station with an application server to provide additional services to the mobile station located within the femtocell. The additional services may be CDMA services. Also, registering the femtocell with the IMS core network may include transmitting femtocell registration information that does not include information regarding the mobile station to the IMS core network to request IMS services for the mobile station.

Abstract: The present invention provides a method involving a femtocell in communication with a secure core network such as an Internet Protocol Multimedia Subsystem (IMS) network. The method includes receiving, from the femtocell and at a first secure entity in the IMS network, a global challenge including information indicating a random number. The method also includes receiving an authentication response computed by a mobile unit based on the random number and the first key known by the mobile unit and not known by the femtocell. The method further includes determining, at the first secure entity, that the random number is a legitimate random number provided to the femtocell by the IMS network.

Abstract: The present invention provides a method involving a femtocell in communication with an Internet Protocol Multimedia Subsystem (IMS) network. In one embodiment, the femtocell operates according to code division multiple access (CDMA) standards. The method includes receiving, from the femtocell and at a first secure entity in the IMS network, first authentication information generated by the mobile unit using a first random number broadcast by the femtocell in a global challenge. The method also includes receiving, from a second secure entity in the secure network, at least one security key formed based on the global challenge and second authentication information for uniquely challenging the mobile unit. In one embodiment, the second secure entity is a CDMA-based authentication server. The method further includes providing the security key(s) to the femtocell in response to authenticating the mobile unit based upon the second authentication information.

Abstract: The present invention provides a method involving a femtocell in communication with a secure core network such as an Internet Protocol Multimedia Subsystem (IMS) network. The method includes receiving, from the femtocell and at a first secure entity in the IMS network, a global challenge including information indicating a random number. The method also includes receiving an authentication response computed by a mobile unit based on the random number and the first key known by the mobile unit and not known by the femtocell. The method further includes determining, at the first secure entity, that the random number is a legitimate random number provided to the femtocell by the IMS network.

Abstract: A method for processing an application packet for transmission includes receiving a plurality of segments of the application packet in a byte stream, the byte stream including a plurality of blocks, creating a plurality of superblocks within the byte stream by grouping a number of the plurality of blocks within the byte stream, and creating first pseudorandom bits for the plurality of superblocks. The method also includes determining a block number and a superblock number for a beginning of each of the plurality of segments, determining a block number and a superblock number for an ending of each of the plurality of segments in the byte stream.

Abstract: Example embodiments provide a method for performing handovers and key management while performing handovers. The method includes communicating a random handover seed key protected by a secure protocol from a core component of a network to a user equipment. The secure protocol prevents the random handover seed key from being learned by base stations supported by the core component of the network. The secure protocol may be non-access stratum signaling of an evolved packet system environment for wireless communications.

Abstract: One example embodiment of the present invention discloses a method for processing an application packet for transmission, includes breaking the application packet into a plurality of segments, creating first pseudorandom bits, and generating partial tags based on each of the plurality of segments and portions of the first pseudorandom bits associated with each of the plurality of segments. The method further including combining the partial tags including a last partial tag associated with a last segment of the application packet to create an accumulated tag, generating an authentication tag based on the accumulated tag and second pseudorandom bits, storing the authentication tag, and transmitting the plurality of segments including the authentication tag.

Abstract: The present invention provides a method involving a femtocell in communication with a secure core network such as an Internet Protocol Multimedia Subsystem (IMS) network. The method includes receiving, from the femtocell and at a first secure entity in the IMS network, a global challenge including information indicating a random number. The method also includes receiving an authentication response computed by a mobile unit based on the random number and the first key known by the mobile unit and not known by the femtocell. The method further includes determining, at the first secure entity, that the random number is a legitimate random number provided to the femtocell by the IMS network.

Abstract: A method of establishing authentication keys at both a network and mobile equipment are provided. The authentication key generated by the mobile equipment is based on both mobile keys and network keys, which are each calculated by the mobile equipment. The authentication key generated by the network is based on both mobile keys and network keys, which are each calculated by the network. The mobile keys are calculated from a challenge generated by the mobile equipment and the network keys generated by the mobile based on a challenge generated by network.

Abstract: In the method a code mask for coding transmission over a traffic channel is generated based on a base station differentiator and a traffic channel differentiator. Base station differentiators are used to differentiate between different base stations and traffic channel differentiators are used by a base station to differentiate between different traffic channels assigned by a base station.