Hitachi, Ltd.

Hikari Namba

Hiroshi Furukawa

Shigeru Miyake

Hideomi Idei

Satoru Tezuka

Kenichi Kihara

Chiho Kitahara

Shihoko Taguchi

Alberto Suzano

Satoshi Miyazaki

Kazuo Takaragi

In a network development support system, it is supported that logical hierarchic structure, physical parameters, and logical parameters of a network are integrally designed in an environment in which relationships therebetween can be confirmed. Definition of logical hierarchic structure of the network is accepted in the form of a tree of containers in a container tree window. Physical and logical parameters are accepted in physical and logical object windows, respectively. The physical and logical object windows are created in association with containers of the container trees.

Network development support system

According to a cryptographic communication system which can safely perform cipher conversion processing when cryptographic communication is performed between terminals using different cipher types, when a terminal 10A-1 connected to a LAN-A using a cryptographic algorithm C1 transmits data to a terminal 10B-1 connected to a LAN-B using a cryptographic algorithm C2, the terminal 10A-1 generates two meaningless data items from the data to be transmitted, decrypts the two generated data items according to the cryptographic algorithm C1, and then transmits the decrypted data to two cryptographic protocol conversion servers and for dividing the data into two data items. Each of the cryptographic protocol conversion servers decrypts each transmitted data item, the re-encrypts the decrypted data according to the cryptographic algorithm C2, and then transmits the data to the terminal 10B-1. The terminal 10B-1 restores original transmission data on the basis of the two data items transmitted from the respective cryptographic protocol conversion servers.

Cryptographic communication system

Growing community of inventors

Yokohama, Japan

Hikari Namba