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Today, Wi-Fi is part of everyday life—in offices, shops, medical practices, law firms, and international corporations. But while speed and range are often the main focus, one aspect is too often overlooked: security.
Benjamin Körnig, WLAN expert at SerNet, has been working on securing wireless networks for years. “Secure transmission, secure operation” is the topic of his contribution to the upcoming SerNet Forum, which will take place on October 1, 2025. In the run-up to the event, he gives us a little insight into what he frequently encounters in practice and what companies can do better right away. If you would like to know more or discuss the details with the SerNet team, register for the SerNet Forum free of charge.
Why fast does not mean secure
“A typical argument is: It's just Wi-Fi. But that's where the sense of security ends, right where the cable plugs into the wall,” explains Benjamin. “An unprotected Wi-Fi network is like an open door into the company, and whoever finds it has access to more than just the Internet connection.” However, Wi-Fi is still mostly understood as a connection to the outside world. People often forget that it is also a way into the company. “The crucial question I always ask is: What can you access from the Wi-Fi? Often it's not just websites, but sensitive company data. Where networks are poorly planned, attackers suddenly have a clear path into the heart of the company.”
The mistake often lies in the comparison with home. There, speed is what counts above all else: smooth streaming, full range to every corner. In everyday business life, there is more at stake. Here, the reliability of the protective mechanisms is decisive. Benjamin sums it up this way: “Speed does not protect data. Security must be planned and implemented in the same way as the technology that ensures fast and, above all, reliable reception.”
And in the end, it's also a question of cost: the damage caused by an attack is almost always higher than any investment in a secure network.
Small steps, big impact
“Even switching from WPA2 to WPA3 significantly increases security,” explains Benjamin. “It's a minor technical change, but it makes a big difference.” However, there are still some pitfalls: some devices are too old for WPA3. “In that case, it helps to move them to a separate network or replace them – we'll also be discussing this at the SerNet Forum.”
It is also important not to view Wi-Fi security solely from a technical perspective: “Social engineering also plays a role. That's why Wi-Fi security should be part of every security concept and every internal training program.”
Invitation to the SerNet Forum
Anyone who would like to explore these topics in more depth is cordially invited to the next SerNet Forum:
- Wednesday, October 1, 2025, 5–8 p.m.
- Medienhaus, Bahnhofsallee 1b, Göttingen
In addition to Benjamin Körnig's presentation, Dr. Johannes Loxen, founder of SerNet, will give a strategic talk on the importance of secure Wi-Fi as part of stable infrastructures. Afterwards, there will be an opportunity to exchange ideas over tapas and drinks at El Punto.
Participation is free of charge – register at: https://sernet.de/forum
The SerNet Forum is supported by faktor magazine as a media partner.
More on the topic of Wi-Fi security at SerNet
The forum is just the beginning: SerNet supports companies of all sizes in making their Wi-Fi infrastructures secure, stable, and future-proof – from planning and operation to continuous optimization. You can find an overview of the solutions and services here: https://sernet.de/produkte/wlan
