Webinar Held on 'How to Prevent File Leaks When Incidents Occur at Contractors, Even After Files Are Handed Over?'
DataClasys Co., Ltd. and Majisemi Co., Ltd. will hold a webinar focusing on how to prevent information leakage risks when sharing files with external contractors. The webinar will introduce the file encryption and IRM system "DataClasys" and explain specific methods for access control even after files are handed over, providing practical measures for IT and security personnel.
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- 📰 Published: May 7, 2026 at 18:00
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## Press Release Information
Title: 'Webinar Held on 'How to Prevent File Leaks When Incidents Occur at Contractors, Even After Files Are Handed Over?'
Subtitle:
Company Name:
Industry:
Body (first 8000 characters):
■ File sharing with contractors and external locations is now unavoidable.
In many organizations, continuously exchanging highly sensitive files with specific contractors or overseas/external locations is a daily part of operations. This includes design and technical information in manufacturing, contract and customer data in finance and insurance, and resident and personal information associated with outsourcing in government agencies and local authorities. Due to the nature of the work, it is often necessary to share files frequently and regularly with specific parties, making the option of 'not sharing' unrealistic. The question is how to protect information, assuming external sharing.
■ Even with internal measures, protection 'after handover' is not guaranteed.
'Attacks targeting contractors' was ranked second among threats for organizations in IPA's 'Top 10 Information Security Threats 2025'. In 2024, Iseto, a company handling printing and information processing, suffered a ransomware attack, resulting in the leakage of over 3.07 million pieces of personal information entrusted by approximately 100 organizations, including local governments and financial institutions. Endpoint measures such as EDR do not function in the environment of the party to whom the files were handed. Furthermore, managerial measures such as NDAs, regular audits, and checklists are fundamental for contractor management, but they often become mere formalities over years of business relationships. With cloud usage and remote work becoming commonplace, responding to risks 'after handover' requires a shift in thinking: protecting the data itself.
■ Encrypted and access-controlled files that can be managed even after handover.
This seminar will explain the concepts and countermeasures for mitigating leakage risks even if an incident occurs at the recipient, assuming file sharing with contractors and external locations. Using the file encryption and IRM system 'DataClasys', we will introduce a mechanism to continuously control operation rights such as viewing, editing, printing, and copying from the administrator's side even after sending, in line with actual operational flows. We will organize measures for 'protecting the file itself', which differs from endpoint security, including realistic conditions for introduction and operation. This content will be particularly useful for IT and security personnel who are considering specific measures for secure file sharing with contractors and external locations.
■ Organizers/Co-organizers
DataClasys Co., Ltd.
■ Cooperation
Open Source Utilization Research Institute Co., Ltd.
Majisemi Co., Ltd.
Click here for details and participation application.
Majisemi will continue to hold webinars that are 'useful for participants'.
Past seminar public materials and other recruiting seminars can be viewed ▶ here.
Majisemi Co., Ltd.
3F Shiodome Building, 1-2-20 Kaigan, Minato-ku, Tokyo 105-0022
Inquiries: https://majisemi.com/service/contact/
Keywords:
Title: 'Webinar Held on 'How to Prevent File Leaks When Incidents Occur at Contractors, Even After Files Are Handed Over?'
Subtitle:
Company Name:
Industry:
Body (first 8000 characters):
■ File sharing with contractors and external locations is now unavoidable.
In many organizations, continuously exchanging highly sensitive files with specific contractors or overseas/external locations is a daily part of operations. This includes design and technical information in manufacturing, contract and customer data in finance and insurance, and resident and personal information associated with outsourcing in government agencies and local authorities. Due to the nature of the work, it is often necessary to share files frequently and regularly with specific parties, making the option of 'not sharing' unrealistic. The question is how to protect information, assuming external sharing.
■ Even with internal measures, protection 'after handover' is not guaranteed.
'Attacks targeting contractors' was ranked second among threats for organizations in IPA's 'Top 10 Information Security Threats 2025'. In 2024, Iseto, a company handling printing and information processing, suffered a ransomware attack, resulting in the leakage of over 3.07 million pieces of personal information entrusted by approximately 100 organizations, including local governments and financial institutions. Endpoint measures such as EDR do not function in the environment of the party to whom the files were handed. Furthermore, managerial measures such as NDAs, regular audits, and checklists are fundamental for contractor management, but they often become mere formalities over years of business relationships. With cloud usage and remote work becoming commonplace, responding to risks 'after handover' requires a shift in thinking: protecting the data itself.
■ Encrypted and access-controlled files that can be managed even after handover.
This seminar will explain the concepts and countermeasures for mitigating leakage risks even if an incident occurs at the recipient, assuming file sharing with contractors and external locations. Using the file encryption and IRM system 'DataClasys', we will introduce a mechanism to continuously control operation rights such as viewing, editing, printing, and copying from the administrator's side even after sending, in line with actual operational flows. We will organize measures for 'protecting the file itself', which differs from endpoint security, including realistic conditions for introduction and operation. This content will be particularly useful for IT and security personnel who are considering specific measures for secure file sharing with contractors and external locations.
■ Organizers/Co-organizers
DataClasys Co., Ltd.
■ Cooperation
Open Source Utilization Research Institute Co., Ltd.
Majisemi Co., Ltd.
Click here for details and participation application.
Majisemi will continue to hold webinars that are 'useful for participants'.
Past seminar public materials and other recruiting seminars can be viewed ▶ here.
Majisemi Co., Ltd.
3F Shiodome Building, 1-2-20 Kaigan, Minato-ku, Tokyo 105-0022
Inquiries: https://majisemi.com/service/contact/
Keywords: