Abstract: A receiver includes: a broadcast contents acquisition unit configured to acquire contents from a broadcast signal; a determination unit configured to determine whether a received application is an application whose reference to the contents has been permitted; a recording unit configured to record, in a first storage area, an application whose reference to the contents has been determined to have been permitted by the determination unit, and record, in a second storage area, an application whose reference to the contents has been determined not to have been permitted by the determination unit; an execution unit configured to execute the application recorded in at least one of the first storage area and the second storage area; and a reference refusal unit configured to refuse reference to the contents acquired by the broadcast contents acquisition unit due to execution of an application other than the application recorded in the first storage area.

Abstract: A receiving device includes: an output unit configured to output content broadcast from a transmitting device; an application execution unit configured to execute an application; a security policy acquiring unit configured to acquire security policy level data sent from the transmitting device with respect to the application, the security policy level data indicating a sorted level of the application; a policy level acquiring unit configured to acquire policy level data sent from the transmitting device with respect to currently broadcast content, the policy level data indicating a sorted level of the currently broadcast content; a determining unit configured to determine whether or not the application is an application to be controlled, based on the policy level data acquired by the policy level acquiring unit and the security policy data of the application acquired by the security policy acquiring unit; and an application control unit configured to instruct the application execution unit to control the appl

Abstract: A reception device includes an access control unit configured to determine whether access to the application programming interface is permitted based on a determination according to the type stored in the application storage unit to correspond to the application identification information set in the call instruction. In addition, the reception device includes a web server unit configured to receive the call instruction from the browser unit, inquire of the access control unit about whether access to the application programming interface is permitted, and control the call instruction according to a result of a determination which is made by the access control unit in response to the inquiry.

Abstract: A receiver includes: a broadcast contents acquisition unit configured to acquire contents from a broadcast signal; a determination unit configured to determine whether a received application is an application whose reference to the contents has been permitted; a recording unit configured to record, in a first storage area, an application whose reference to the contents has been determined to have been permitted by the determination unit, and record, in a second storage area, an application whose reference to the contents has been determined not to have been permitted by the determination unit; an execution unit configured to execute the application recorded in at least one of the first storage area and the second storage area; and a reference refusal unit configured to refuse reference to the contents acquired by the broadcast contents acquisition unit due to execution of an application other than the application recorded in the first storage area.

Abstract: The receiver (90) is provided with an application authentication unit (917) which uses a verification key to verify whether or not a signature of an application is valid and authenticates whether the acquired application is either an A-application or an ordinary application based on the validity of the signature; and a resource access controlling unit (918) performing a resource access control based on a resource access controlling table.

Abstract: A receiving device includes: an output unit configured to output content broadcast from a transmitting device; an application execution unit configured to execute an application; a security policy acquiring unit configured to acquire security policy level data sent from the transmitting device with respect to the application, the security policy level data indicating a sorted level of the application; a policy level acquiring unit configured to acquire policy level data sent from the transmitting device with respect to currently broadcast content, the policy level data indicating a sorted level of the currently broadcast content; a determining unit configured to determine whether or not the application is an application to be controlled, based on the policy level data acquired by the policy level acquiring unit and the security policy data of the application acquired by the security policy acquiring unit; and an application control unit configured to instruct the application execution unit to control the appl

Abstract: A receiving device includes: a policy data storing unit configured to store a policy level table and an output determination table, the policy level table indicating, for each content, a policy level representing a level of a method of displaying windows for a broadcast and an application, and the output determination table indicating, for each policy level, a method of displaying windows for a broadcast and an application; an application execution unit configured to execute an application; a broadcast receiving unit configured to receive a broadcast signal; a policy level comparing unit configured to read from the policy level table stored in the policy data storing unit, a policy level associated with the content included in the broadcast signal received by the broadcast receiving unit; and a policy mediation unit configured to read from the output determination table stored in the policy data storing unit, the method of displaying the windows associated with the policy level read by the policy level compar

Abstract: A node apparatus includes a second computation portion that references cache information held by the own node apparatus, the cache information indicating a node holding an object that is a search target in an overlay network in association with the object, and calculates, with respect to the object corresponding to the node indicated in the cache information, a distance between an object location and a node of interest in a logical space in which the overlay network is constructed, the object location being a logical location of the object, and the node of interest being a node other than the own node, and a transfer destination selection portion that selects a transfer destination to which the cache information is to be transferred, based on the distance calculated by the second computation portion. The cache information is transferred to the transfer destination selected by the transfer destination selection portion.