February 26, 2018, 11:19 am
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1 Philippine Peso = 1 Philippine Peso
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1 Philippine Peso = 107.39382 Paraguayan Guarani
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1 Philippine Peso = 0.14989 Solomon Islands Dollar
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1 Philippine Peso = 0.02545 Singapore Dollar
1 Philippine Peso = 0.01382 St Helena Pound
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1 Philippine Peso = 147.2973 Sierra Leone Leone
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1 Philippine Peso = 0.07317 Turkish Lira
1 Philippine Peso = 0.12974 Trinidad Tobago Dollar
1 Philippine Peso = 0.56444 Taiwan Dollar
1 Philippine Peso = 43.35907 Tanzanian Shilling
1 Philippine Peso = 0.52008 Ukraine Hryvnia
1 Philippine Peso = 70.40541 Ugandan Shilling
1 Philippine Peso = 0.01931 United States Dollar
1 Philippine Peso = 0.54923 Uruguayan New Peso
1 Philippine Peso = 157.72201 Uzbekistan Sum
1 Philippine Peso = 558.39769 Venezuelan Bolivar
1 Philippine Peso = 438.97684 Vietnam Dong
1 Philippine Peso = 2.05502 Vanuatu Vatu
1 Philippine Peso = 0.04818 Samoa Tala
1 Philippine Peso = 10.28822 CFA Franc (BEAC)
1 Philippine Peso = 0.05212 East Caribbean Dollar
1 Philippine Peso = 10.28822 CFA Franc (BCEAO)
1 Philippine Peso = 1.87297 Pacific Franc
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PRINTED CIRCUIT: Defending today’s OT environments

by  John Maddison

(Last of two parts)

Addressing the requirements of an OT network requires an integrated approach comprised of the following elements:

SEGMENTATION AND ENCRYPTED COMMUNICATIONS: Perimeter security alone is inadequate. Security needs to be driven deep into the OT infrastructure, segmenting systems and devices, actively monitoring east-west traffic, and isolating compromised devices. In addition, applications and data should be encrypted in order to prevent the injection of malware into that traffic.

ACCESS CONTROL: Access to OT devices needs to be strictly managed and monitored for devices, users, applications, and protocols.  

SECURE WIRELESS ACCESS: Industrial IoT (IIoT) devices communicate using a wide variety of communications protocols. Securing Wi-Fi connections only solves part of the problem. There are now thousands of vendors building IoT devices using a wide variety of connectivity and communications technologies in addition to Wi-Fi, including Bluetooth, NFC, Zigbee, and RFID. And this doesn’t include IoT devices hardwired into the network behind the firewall. Security resources need to be committed to identifying, segmenting, and securing these connections.

 VULNERABILITY AND PATCH MANAGEMENT: With availability as a primary concern for OT networks and devices, patch management has historically not only been overlooked, but actively avoided. Operators may specifically decide not to patch systems that are operational and cannot afford to be taken offline for an update. But as these devices are connected to the IT network and Internet, this approach can no longer remain the status quo. Cybercriminals target known vulnerabilities, so tracking devices and vulnerabilities and implementing an aggressive patch and replace program is essential. For systems that cannot tolerate any down time, it is critical to deploy redundant, active-active devices, alternate data routes, or strict segmentation and active signature and behavioral-based security to protect unpatchable devices.

BEHAVIORAL ANALYTICS AND TRACKING: Advanced threats require more than passive security systems, especially when protecting critical infrastructure. Fortunately, the behavior of most OT systems can be pretty easily defined, which means that unusual or aberrant behavior should be likewise relatively easy to detect and block with a UEBA (user and entity behavior analytics) system in place.

 RUGGEDIZED DEVICES: Traditional OT devices are often required to operate in industrial environments, exposed to extremes in temperature, weather, vibration, and impact. As IT and IoT devices are introduced to this environment, it is critical that organizations select those devices that have been tested and rated to function in extreme settings. The same is true for the security technologies used to protect OT devices and networks.

DEEP PACKET INSPECTION: Malware is increasingly successful at hiding and obfuscating attacks inside applications and data. Given the sensitive nature of industrial control systems (ICS) and the potential for devastating results should they be compromised, it is essential that organizations implement a combination of signature- and protocol/behavioral-based inspection of traffic traveling to, from, and between OT systems to prevent the abuse of particular industrial protocols. Such an approach is also better suited to the OT environments as it can provide protection critical protections without requiring frequent updates.

 The transition to hyperconnected networks, such as smart cities and connected utility services, is driving the convergence of IT, OT, and IoT networks. To successfully defend these integrated networks, organizations need an architecture that scales across the entire infrastructure to provide unified visibility and control, distributed segmentation, and integrated protection. Protecting and defending today’s critical infrastructures requires a single, unified approach that integrates security solutions into an interactive Security Fabric capable of adapting to and spanning distributed IT environments, while simultaneously providing the advanced capabilities needed to defend their critical OT infrastructure.

The author, John Maddison has more than 20 years of experience in the telecommunications, IT Infrastructure, and security industries. Previously he held positions as general manager data center division and senior vice president core technology at Trend Micro. Before that John was senior director of product management at Lucent Technologies. He has lived and worked in Europe, Asia, and the United States. John graduated with a bachelor of telecommunications engineering degree from Plymouth University, United Kingdom. 
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