Bodet-Time

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Articles and resources

GNSS signal jamming and spoofing - an underestimated risk?

In many applications, including time synchronisation, GNSS is now commonplace. The best known constellation is GPS. However, all these GNSS systems share a common vulnerability: the signals transmitted by these satellites are very weak. GNSS satellites operate from the Earth’s orbit. The transmitted signal is extremely weak when it reaches the earth’s surface. This low signal strength at the receivers makes GNSS use susceptible to intentional (malicious) or unintentional interference.

Why is accurate timestamping essential for systems on a IT network?

With the rise of the Internet and IT networks, many solutions today work over IP. Whether video surveillance, access control, or attendance time management, all this equipment uses IP technologies to communicate and operate. As with any network, time synchronisation is essential, not only to ensure the proper functioning of monitoring systems, but also to ensure accurate and chronological timestamping of events.

Time Synchronisation

To work, your network infrastructure needs a single accurate time reference. All IT equipment has an embedded hardware or software clock which is used by the equipment to timestamp files, transactions, events, images, etc. This internal clock drifts like any ordinary watch. It becomes an issue when these devices are connected to a network and share common resources such as file systems.

Enhance your network security

Using an Internet service to retrieve and distribute the time is a common practice in many businesses. It doesn’t require any special equipment – just an Internet connection. Up to now, this practice has seemed simple and safe in principle. And yet...

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