公开(公告)号：EP4213044A1

公开(公告)日：2023-07-19

申请号：EP20957653.7

申请日：2020-10-14

申请人： Nippon Telegraph And Telephone Corporation

发明人： NAKANO, Hiroki ,  CHIBA, Daiki

IPC分类号： G06F16/9532 ,  G06F21/44

摘要： An acquisition unit (15a) acquires user-generated content generated in each service in a predetermined period. A generation unit (15b) generates a search query by using words that appear in the user-generated content for each service. A collection unit (15c) collects user-generated content generated in a plurality of services by using the generated search query.

公开(公告)号：EP4231179A1

公开(公告)日：2023-08-23

申请号：EP20957652.9

申请日：2020-10-14

申请人： Nippon Telegraph And Telephone Corporation

发明人： NAKANO, Hiroki ,  CHIBA, Daiki

IPC分类号： G06F21/44 ,  G06F21/50 ,  G06F16/908

摘要： An extraction unit (15g) accesses an entrance URL described in user-generated content generated by a user in a plurality of services in a predetermined period to extract a feature quantity of the user-generated content. The training unit (15e) performs training by using the extracted feature quantity of the user-generated content generated by a normal user and a feature quantity of content generated by a malicious user. A determination unit (15f) determines whether or not the user-generated content has been generated by the malicious user using a trained model.

公开(公告)号：EP4213048A1

公开(公告)日：2023-07-19

申请号：EP20957650.3

申请日：2020-10-14

申请人： Nippon Telegraph And Telephone Corporation

发明人： NAKANO, Hiroki ,  CHIBA, Daiki

IPC分类号： G06F21/44 ,  G06F21/50 ,  G06F16/908

摘要： A calculation unit (15d) calculates a characteristic amount of user-generated content generated by a user in a predetermined period. A learning unit (15e) performs learning using the calculated characteristic amount of the user-generated content generated by a legitimate user and a characteristic amount of content generated by a malicious user. A determination unit (15f) determines whether the user-generated content is generated by the malicious user using a learned model.

公开(公告)号：EP4213049A1

公开(公告)日：2023-07-19

申请号：EP20957651.1

申请日：2020-10-14

申请人： Nippon Telegraph And Telephone Corporation

发明人： NAKANO, Hiroki ,  CHIBA, Daiki

IPC分类号： G06F21/44 ,  G06F21/50 ,  G06F16/908

摘要： A generation unit (15b) generates a search query, using words appearing in the user generation content for each service. A collection unit (15c) collects the user generation content generated in a plurality of services, using the generated search query. A calculation unit (15d) calculates a feature amount of the user generation content of the collected predetermined service. A learning unit (15e) performs learning, using the feature amount of the user generation content generated by a normal user and a feature amount of a content generated by a malicious user. A determination unit (15f) determines whether the user generation content is generated by a malicious user by the learned model. An extraction unit (15g) accesses an entrance URL described in the user generation content and outputs a feature amount of an attack of the user generation content as threat information, when the user generation content is determined to be generated by the malicious user.