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.

Abstract: A computer readable storage medium encoded with computer instructions for causing a tamper resistant microprocessor which has a function for decrypting and executing encrypted codes and a table formed by a plurality of regions for storing a plurality of encryption keys corresponding to at least one program and at least one shared library to be called up by the at least one program, to use a shared library called up from a calling source program, the instructions including the steps of causing the tamper resistant microprocessor to create a task for the shared library, causing the tamper resistant microprocessor to allocate a task identifier to the task, causing the tamper resistant microprocessor to acquire an instruction key from a header of the shared library, causing the tamper resistant microprocessor to store the instruction key into a region of the table corresponding to the task identifier allocated to the task for the shared library in the microprocessor, causing the tamper resistant microprocessor to

Abstract: In an inner memory type tamper resistant microprocessor, a requested secret protection attribute requested for each access target memory page by a task is set and stored exclusively from other tasks, at a time of reading a program into memory pages and executing the program as the task, and a memory secret protection attribute is set and stored for each access target memory page by the task, at a time of executing the task. Then, an access to each access target memory page is refused when the requested secret protection attribute for each access target memory page and the memory secret protection attribute for each access target memory page do not coincide.

Abstract: In a device authentication management system in which a device acquires a secret information from an authentication management unit and carries out an authentication in order to carry out communications with another device by using the secret information, the authentication management unit generates the secret information that contains a first authentication information for carrying out communications between the authentication management unit and the device, and a second authentication information for carrying out communications between the device and the another device; carries out the authentication in order to carry out communications with the device, by using the first authentication information; and transmits the second authentication information according to the authentication.

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: A connection control apparatus includes a monitoring unit, a determining unit, a transferring unit, and a notifying unit. The monitoring unit monitors a status of a communication terminal. The determining unit determines, on a basis of a monitoring result, whether or not the communication terminal is able to respond to a connection request therefor. The transferring unit transfers the connection request to the communication terminal when the transferring unit has received a connection request for the communication terminal and the determining unit determines that the communication terminal is able to respond to the connection request. The notifying unit calls attention around the connection control apparatus when the determining unit determines that the communication terminal is unable to respond to the connection request after the transferring unit has received the connection request.

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.

Abstract: In an inner memory type tamper resistant microprocessor, a requested secret protection attribute requested for each access target memory page by a task is set and stored exclusively from other tasks, at a time of reading a program into memory pages and executing the program as the task, and a memory secret protection attribute is set and stored for each access target memory page by the task, at a time of executing the task. Then, an access to each access target memory page is refused when the requested secret protection attribute for each access target memory page and the memory secret protection attribute for each access target memory page do not coincide.

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: In a device authentication management system in which a device acquires a secret information from an authentication management unit and carries out an authentication in order to carry out communications with another device by using the secret information, the authentication management unit generates the secret information that contains a first authentication information for carrying out communications between the authentication management unit and the device, and a second authentication information for carrying out communications between the device and the another device; carries out the authentication in order to carry out communications with the device, by using the first authentication information; and transmits the second authentication information according to the authentication.