Nippon Telegraph and Telephone Corporation

Ntt Corporation

Manami Ito

Hiroyoshi Takiguchi

Yuki Yamanaka

Ryota Sato

Takeshi Nakatsuru

Yoshiaki Nakajima

Kenichiro Muto

Kimihiro Yamakoshi

Seishi Ouchi

Nobuhiro Chiba

Reika Arakawa

An information processing device having a memory and a processor. The processor is coupled to the memory and programmed to execute a process including learning each feature of a dynamic file and a static file to generate a learning model; acquiring a predetermined file group at a reference point of time from an external device that uses the predetermined file group; and extracting a determination target file, which is the static file, from the predetermined file group on the basis of the learning model.

Information processing device, information processing method and information processing program for extracting a static file from a file group on the basis of a learning model

A tampering detection device includes tampering detection circuitry configured to acquire an access frequency of a monitoring target file, calculate a number of times of scanning in a scan pattern for each monitoring target file on a basis of the access frequency acquired, and determine the scan pattern on a basis of the number of times of scanning calculated.

Falsification detection device, falsification detection method, and falsification detection program

A storage unit stores a size of a free area of storage of target equipment, and software saved in the storage. The generation unit generates a graph including a number of nodes according to the size of the free area of the storage, and transmits the graph to the target equipment. The calculation unit calculates a hash value corresponding to each software block saved in the storage. The verification unit verifies the presence or absence of tampering of the storage of the target equipment using the hash value corresponding to the block calculated, a response calculated using the graph returned to a challenge that specifies a node of the graph, and a hash value corresponding to the block returned as the response to the challenge that specifies the block.

Verification device, verification system, verification method, and verification program

Using sensor data indicating a state of a control target () outputted from a sensor () and a control input to control the state of the control target (), a state estimation unit () of a controller () calculates an estimate of the state of the control target (). Further, a calculation unit () of the controller () calculates the control input to which colored noise in a predetermined frequency band is added, according to the calculated estimate of the state of the control target ().

Detection method, detection system, and detection program

Growing community of inventors

Musashino, Japan

Manami Ito