Abstract: A network of radio devices is managed by carrying out a radio device registration at a registering authentication server when it is possible to communicate with all the authentication servers, distributing registration information to the authentication servers, managing the registration information at each one of the authentication servers, carrying out a radio device deletion at a deleting authentication server, distributing deletion information to the authentication servers, and deleting the radio device from the registration information according to the deletion information at each one of the authentication servers.

Abstract: An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C) in specified proportions. The polypropylene homopolymer (A1) exhibits an MFR (230° C.) of 20 to 300 g/10 min, a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from a 13C-NMR spectrum, each of 0.05% or less, and an Mw/Mn, determined by GPC, of 1 to 3.

Abstract: An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C), or comprising a propylene block copolymer (A2) and an inorganic filler (C) optionally together with an elastomer (B), in specified proportions. The propylene homopolymer (A1), or the propylene homopolymer segment of the propylene block copolymer (A2) exhibits an MFR (230-C) of 20 to 300 g/10 min, a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from a 13C-NMR spectrum, each of 0.2% or less, and an Mw/Mn, determined by GPC, of 1 to 3.

Abstract: In a microprocessor, a program key for decrypting a program and a data key for encrypting/decrypting data processed by the program are handled as cryptographically inseparable pair inside the microprocessor, so that it becomes possible for the microprocessor to protect processes that actually execute the program, without an intervention of the operating system, and it becomes possible to conceal secret information of the program not only from the other user program but also from the operating system.

Abstract: In a microprocessor, a program key for decrypting a program and a data key for encrypting/decrypting data processed by the program are handled as cryptographically inseparable pair inside the microprocessor, so that it becomes possible for the microprocessor to protect processes that actually execute the program, without an intervention of the operating system, and it becomes possible to conceal secret information of the program not only from the other user program but also from the operating system.

Abstract: A scheme for realizing communications through an external network such as telephone network from a contents processing device such as AV device or PC connected to a local network such as home network is disclosed. The contents processing device solicits a set up of connection to the server device through the telephone network, to a gateway device which is connected with both the home network and the telephone network. Then, the gateway device carries out a call set up with respect to a specified address on the telephone network, upon receiving the solicitation from the contents processing device, and transfers data transmitted from the contents processing device to a connection established by the call set up, and data arriving from the connection established by the call set up to the contents processing device.

Abstract: A microprocessor executes programs in a pipeline architecture that includes a task register management unit that switches a value of a task register to second register information that is used when a second task is executed after the execution of a first task is completed, if a switch instruction to the second task is issued when a plurality of units executes the first task, and a task manager that switches a value of a task identification information register to a second task identifier after the value is switched to the second register information, and grants each of the plurality of units permission to execute the second task.

Abstract: A microprocessor includes a decryption unit that decrypts information to be utilized by a processor core to obtain plaintext information when the acquired information is encrypted; and a plaintext information storing unit that stores the plaintext information. The microprocessor also includes a protected attribute adding unit that adds a protected attribute indicating one of protection and non-protection to the plaintext information based on whether the decryption has been performed; an access request acquiring unit that acquires an access request to the plaintext information; a request type identifying unit that identifies a type of request of the access request; and an access controlling unit that controls an access to the plaintext information based on the type of request and the protected attribute.

Abstract: Under a multi-task environment, a tamper resistant microprocessor saves a context information for one program whose execution is to be interrupted, where the context information contains information indicating an execution state of that one program and the execution code encryption key of that one program. An execution of that one program can be restarted by recovering the execution state of that one program from the saved context information. The context information can be encrypted by using the public key of the microprocessor, and then decrypted by using the secret key of the microprocessor.

Abstract: A microprocessor having a processor core includes an information acquisition unit that acquires information encrypted to be used by the processor core, from outside; a decryption unit that decrypts the information with a symmetric key to obtain plain text; and a controller that controls processing on the information acquired by the information acquisition unit based on the symmetric key.

Abstract: A propylene polymer composition is prepared by mixing propylene homo- or co-polymer (A) obtained using a transition metal catalyst compound (h), defined herein, with a co-catalyst, e.g., organoaluminum oxy compound, with an olefin elastomer (D) and another olefin polymer (E), e.g., polyethylene. Alternatively, the combination of propylene polymer (A), olefin elastomer (D) and olefin polymer (E) is prepared by a multi-stage polymerization method. In both cases, the propylene homo- or co-polymer (A) may include a second propylene homo- or co-polymer (A?) wherein the ratio of intrinsic viscosities of propylene polymers (A) and (A?) is in the range of 3 to 30. These propylene polymer compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, etc., and can be used in the fabrication of structural materials, films and sheets.

Abstract: Under a multi-task environment, a tamper resistant microprocessor saves a context information for one program whose execution is to be interrupted, where the context information contains information indicating an execution state of that one program and the execution code encryption key of that one program. An execution of that one program can be restarted by recovering the execution state of that one program from the saved context information. The context information can be encrypted by using the public key of the microprocessor, and then decrypted by using the secret key of the microprocessor.

Abstract: A microprocessor includes a first information holding unit, a second information holding unit, and a switching authorization unit. The first information holding unit holds process identification information and authentication information which are associated with each other. The second information holding unit denies access from outside, and holds entry information of a process and the authentication information which are associated with each other. The switching authorization unit allows switching process when the authentication information held in the first information holding unit with the authentication information held in the second information holding unit match.

Abstract: The on-chip multi-core type tamper resistant processor has a feature that, on the microprocessor package which has a plurality of instruction execution cores on an identical package and an ciphering processing function that can use a plurality of ciphering keys in correspondence to programs under a multi-task program execution environment, a key table for storing ciphering keys and the ciphering processing function are concentrated on a single location on the package, such that it is possible to provide a tamper resistant microprocessor in the multi-processor configuration that can realize the improved processing performance by hardware of a given size compared with the case of providing the key table and the ciphering processing function distributedly.

Abstract: A scheme for realizing a contents protection procedure between devices that are not connected to the same network, in a system where the IEEE 1394 buses are connected together through a 1394 bridge or a system where the IEEE 1394 buses are connected together through another radio network, is disclosed. A network connection device notifies information regarding a transmission node on the first IEEE 1394 bus to a reception node on the second IEEE 1394 bus, so that the reception node can carry out the authentication and key exchange procedure directly with the transmission node on a different network.

Abstract: A propylene polymer composition comprising a propylene polymer prepared by using a zirconocene catalyst having two aryl-substituted indenyl group and having a melt flow rate (MFR) of 0.01 to 30 g/10 min and a second propylene polymer prepared by using a zirconocene catalyst having a melt flow rate (MFR) of 30 to 1,000 g/10 min and, if desired, a soft polymer, a ratio of the MFR of the second propylene polymer to the MFR of the second propylene polymer being not less than 30. These propylene polymer compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, etc., and hence they can be favorably used for various structural materials such as those of automobile and electrical appliances, daily necessaries, various films and sheets.

Abstract: A propylene polymer composition is prepared by mixing propylene homo- or co-polymer (A) obtained using a transition metal catalyst compound (h), defined herein, with a co-catalyst, e.g., organoaluminum oxy compound, with an olefin elastomer (D) and another olefin polymer (E), e.g., polyethylene. Alternatively, the combination of propylene polymer (A), olefin elastomer (D) and olefin polymer (E) is prepared by a multi-stage polymerization method. In both cases, the propylene homo- or co-polymer (A) may include a second propylene homo- or co-polymer (A′) wherein the ratio of intrinsic viscosities of propylene polymers (A) and (A′) is in the range of 3 to 30. These propylene polymer compositions are excellent in heat resistance, mechanical strength, tensile elongation at break, etc., and can be used in the fabrication of structural materials, films and sheets.

Abstract: A data transmitting node and a network inter-connection node suitable for use in the home network environment. In a case of transmitting information data from a data transmitting node connected with a physical network to a receiving node connected with the physical network or another physical network, a data transmitting node transmits the control message including an IP address information of a data transmission destination, a header/channel information dependent on the physical network, and an information indicating that the information data to be transmitted according to the header/channel information is data in an upper layer of an IP layer. The information data is then transmitted to the receiving node, where the information data contains the header/channel information and data of the upper layer without IP packet encapsulation. A network inter-connection node operates similarly.

Abstract: In a tamper resistant microprocessor having a cache memory, the cache memory stores the decrypted execution code or data into one of cache lines provided in the cache memory, each cache line having a secret protection attribute holding section for storing an actual encryption key used in decrypting the execution code or data, and a cache memory control unit processes a reading request for the execution code or data such that, if the execution code or data exists in the cache memory and the execution code or data in the cache memory is decrypted by an identical encryption key as the prescribed encryption key, the execution code or data in the cache memory is read out.

Abstract: In a method for using the shared library in a tamper resistant microprocessor, the execution code of the shared library is protected because the shared library itself is processed as a task which has a single identifier, and the instruction key for encrypting/decrypting the shared library is recorded at a location within the microprocessor corresponding to that identifier.