US 12,143,357 B2
Communication control apparatus and system
Tatsuya Maruyama, Tokyo (JP); Noritaka Matsumoto, Tokyo (JP); Hiroshi Iwasawa, Tokyo (JP); Hiromichi Endoh, Tokyo (JP); and Junya Fujita, Tokyo (JP)
Assigned to Hitachi, Ltd., Tokyo (JP)
Appl. No. 17/639,860
Filed by Hitachi, Ltd., Tokyo (JP)
PCT Filed Jun. 23, 2020, PCT No. PCT/JP2020/024603
§ 371(c)(1), (2) Date Mar. 2, 2022,
PCT Pub. No. WO2021/059632, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-172583 (JP), filed on Sep. 24, 2019.
Prior Publication US 2022/0329564 A1, Oct. 13, 2022
Int. Cl. H04L 29/06 (2006.01); H04L 9/40 (2022.01)
CPC H04L 63/0209 (2013.01) 5 Claims
OG exemplary drawing
 
1. A communication control apparatus for transferring a communication frame, comprising one or more memory devices having a program stored therein that, when executed by one or more processors, causes the one or more processors to:
receive a communication frame;
identify a plurality of time slots for processing the communication frame;
identify characteristics of the plurality of time slots, wherein the characteristics of the plurality of time slots include at least a communication protocol and at least one of an intended use, and an application program that uses the communication frame;
identify an inspection pattern specific to each of the plurality of time slots to detect an unauthorized content, based at least in part on a priority level of the inspection pattern;
in response to a detection of the unauthorized content, determine a security measure to be taken against the communication frame, the security measure specific to each of the plurality of time slots and in accordance with an identified characteristic of each of the plurality of time slots; and
take the security measure by:
comparing the received communication frame with the inspection pattern, and
changing an error checking code of the communication frame based at least in part on a result of the comparing.