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  6. Methods to prevent information leakage using OWCD: Countermeasures against intrusions via email.

Methods to prevent information leakage using OWCD: Countermeasures against intrusions via email.

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One-way communication restriction device data diode OWCD series

last updated:Aug 20, 2026

MHIパワーエンジニアリング 高砂事業部
MHIパワーエンジニアリング 高砂事業部
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Ransomware damage: Since attackers also utilize AI, it is essential to have leak prevention measures in place based on the premise that intrusion will occur. Are you implementing measures to prevent data theft?

Zero Trust Security: Are you aware that if you don't operate it properly at all times, you could have been breached a long time ago? "Stealth Cyber Attacks": Half of passwords are compromised, allowing intruders to enter freely. Even signals of unauthorized access that you might notice later are stealthy 80% of the time, so you won't realize it at that moment... By the time it gets this far, the probability of a bad move failing is only a few percent. They can do whatever they want, and now with the use of AI, infiltration can be completed in about an hour. It is essential to implement data leakage countermeasures with the assumption that breaches will occur. The key is to "not expose anything" to avoid actual damage. In the case of ransomware attacks, simply gaining access does not usually achieve the objective. Once inside, the attacker will scout the system, penetrate to critical areas, encrypt data to render it unusable, extract confidential information, or continuously send malicious emails... these actions result in actual harm. For this to happen, the virus itself must communicate with a true external intruder AI and be remotely controlled. If this communication is blocked, even if a breach occurs, actual damage has not yet taken place, allowing time to implement countermeasures. Let's implement multi-layered defenses with Zero Trust to prevent lateral movement and OWCD to prevent vertical intrusion/leakage. For inquiries, please refer to the related links below.

    Virus softwareFirewall and intrusion preventionOther security
ファイル逆流防止.jpg

Methods to prevent information leakage using OWCD: Countermeasures against intrusions via email.

ファイル逆流防止.jpg
ファイル逆流防止.jpg
  • Related Link - https://power.mhi.com/jp/group/eng/business/produc…

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For example, email is often cited as a common intrusion route. A virus is embedded in an email attachment, which, when opened, causes infection. Therefore, we position the OWCD to "restrict communication only on the IN side of the email arrival route." Malware sends out information it has accessed along the route it has taken to the remote operator. If this is blocked by the OWCD, they cannot reach core information. Naturally, the leakage of sensitive information is also impossible. The OWCD is designed to limit communication to one direction, preventing backflow. Moreover, since it is a physical measure, unlike software settings such as firewalls, it does not allow for mistakes or forgetfulness. It is being adopted one after another, especially in critical infrastructure such as government agencies, power plants, and transportation systems, where even the slightest error is not tolerated, as well as in various research facilities. We also have software for SMTP transmission and SMTP relay from lines protected by OWCD. OWCD, which is excellent in compatibility with zero trust to prevent horizontal expansion and virus check monitors, should definitely be utilized. For inquiries, please contact us through our company website above.

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Current Ransomware Countermeasures - Establishing a cyber resilience framework based on backups - Building a secure network with the assumption of supply chain attacks - Vulnerability measures to prevent deep infiltration and leakage of ransomware Applicable to all While large corporations are prominently featured in the news, two-thirds of the damage affects small and medium-sized enterprises, with the manufacturing sector (regardless of size) accounting for 40%. Please compare the introduction of OWCD with the revenue loss due to business interruptions. The average cost of recovery efforts alone is 230 million yen! This could lead to immeasurable losses for your company as well. Please refer to the above website.

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P5

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※We are engaged in made-to-order production. Please contact us through our company website above.

Applications/Examples of results

Government agency information systems (reverse flow control in external email reception checks) Traffic information systems (one-way control from the control system to the public web server) Remote monitoring systems for industrial equipment (intrusion prevention at the data transmission unit) Supply chain information collection systems in the industrial sector (intrusion prevention to production facilities, theft prevention at the collection side) Core information management systems in research institutes (intrusion prevention to research facilities, theft prevention from data servers) Defense systems (details are a bit sensitive...) These systems are utilized in government agencies, power plants, manufacturers' research institutes, and production information transmission points, as well as in defense systems. There are systems used both internally and externally, and efforts are being made to connect them organically to improve productivity. It seems that until now, only large corporations at the top of the supply chain have been concerned, but now the target has expanded to include medium and small enterprises and independent-minded companies that do not consider themselves part of the supply chain. There is no guarantee that your company is not being targeted. We are seeing an increase in inquiries and implementations from companies and organizations that have become aware of the risks. For inquiries, please contact us through our company website above.

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Is your data backup risk management okay with OWCD's zero trust security?

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One-way communication data diode OWCD lineup

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Introduction of OWCD usage examples: Attention SIers, this is a business opportunity!

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Data Diode OWCD "Data Secure Link"

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Company information

MHIパワーエンジニアリング

MHIパワーエンジニアリング 高砂事業部

Industrial Machinery

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Our company is a member of the Mitsubishi Heavy Industries Group, serving as a design technology partner for Mitsubishi Heavy Industries, where we engage in planning and mechanical design for prime movers (steam turbines/boilers, gas turbines, water turbines), pumps, and various plants, as well as instrumentation control system planning and electrical design. In order to meet the increasingly diverse and sophisticated needs of our customers, we will continue to challenge ourselves to improve our technological capabilities, streamline operations, and reduce costs based on the trust we have built with users. Through this, we are developing activities that contribute to society by providing the products and engineering capabilities we have cultivated so far to everyone. Alongside the sale of products related to IoT, manufacturing DX, and on-site monitoring/condition monitoring, we will focus on custom orders, customization, and system construction to realize your ideas. We encourage you to consider utilizing our services. https://eng.power.mhi.com

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