Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Satoru Kuriki

Masaaki Harada

Yuusaku Ohta

Hideki Taniguchi

Satomi Amano

Makoto Fujiwara

Yuishi Torisaki

Yusuke Nemoto

Masahiro Sano

The data transfer control device of the present invention is capable of improving data transfer efficiency while discarding error data, a DMA parameter storing control unit () temporarily stores parameters to a store resource; a data processing unit () performs error detection processing for data that is transferred; a DMA parameter return control unit () causes parameters used at transfer time of data for which the processing result in the error detection processing was an error to be returned as parameters for subsequent data transfer use from the store resource; and a completion notification delay control unit (), with regard to the parameters, causes the completion notification to a host system that indicates that data transfer has completed normally for each of the parameters to wait for normal completion of data transfer that uses parameters that had been set earlier than each of the first-mentioned parameters.

Data transfer control device and data transfer control method

A data transfer control deviceincludes a read pointer update unitupdating a value of a global read pointer RPg with a value of a local read pointer (first local read pointer) RPlheld by a local read pointer hold unitwhen completion of data transfer is recognized and a position, in an order of reading descriptors, of a descriptor Dindicated by the local read pointer RPlis earlier than positions of descriptors Dand Drespectively indicated by local read pointers (second local read pointers) RPland RPlheld by the other data transfer control devicesand

Data transfer control device, integrated circuit of same, data transfer control method of same, data transfer completion notification device, integrated circuit of same, data transfer completion notification method of same, and data transfer control system

The present invention relates to a confidential information processing device, a confidential information processing apparatus, and a confidential information processing method, and particularly to a confidential information processing device which performs multiple cryptographic computation for different target data included in a data stream. With this configuration, the context control unit outputs the stream on which the cryptographic computation is performed to an external device or other stream analysis unit. Thus, by setting the number of cryptographic computation on a correspondence table, the number of computation can be set to any number. Thus, the confidential information processing device according to the present invention can perform any number of cryptographic computations on one stream. Furthermore, without outputting the stream whenever a cryptographic computation is completed, multiple cryptographic computations can be performed with one stream input. In addition, by setting the number of cryptographic computation on the correspondence table, the number of computation can be easily changed.

Confidential information processing apparatus, confidential information processing device, and confidential information processing method

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Aichi, Japan

Satoru Kuriki