Most of you probably know this already, but for those who like to go to cafés, and use the wifi, here is a warning for you."It is actually quite simple: if you want absolute security, do not connect to a public network. Only a few months ago, the head of Interpol, Troels Oerting, told the BBC: ‘Anything you send via Wi-Fi is potentially at risk’. The Dutch National Cyber Security Centre also advises against making use of public Wi-Fi networks. This means that if you still want to use the Internet while en route, the best thing to do is to make use of mobile data. It is relatively expensive, but worth it."https://decorrespondent.nl/1103/How-to-safely-use-a-public-Wi-Fi-network/33923868-a908f82a"Wouter removes his laptop from his backpack, puts the black device on the table, and hides it under a menu. A waitress passes by and we ask for two coffees and the password for the WiFi network. Meanwhile, Wouter switches on his laptop and device, launches some programs, and soon the screen starts to fill with green text lines. It gradually becomes clear that Wouter’s device is connecting to the laptops, smartphones, and tablets of cafe visitors.""The idea that public WiFi networks are not secure is not exactly news. It is, however, news that can’t be repeated often enough. There are currently more than American adults own a tablet and more than 155 million own a laptop. Each year the worldwide demand for more laptops and tablets increases. In 2013, an estimated 206 million tablets and 180 million laptops were sold worldwide. Probably everyone with a portable device has once been connected to a public WiFi network: while having a coffee, on the train, or at a hotel.""Slotboom’s device is capable of registering these searches and appearing as that trusted WiFi network. I suddenly see the name of my home network appear on my iPhone’s list of available networks, as well as my workplace, and a list of cafes, hotel lobbies, trains, and other public places I’ve visited. My phone automatically connects itself to one of these networks, which all belong to the black device.""Slotboom can also broadcast a fictitious network name, making users believe they are actually connecting to the network of the place they’re visiting. For example, if a place has a WiFi network consisting of random letters and numbers (Fritzbox xyz123), Slotboom is able to provide the network name (Starbucks). People, he says, are much more willing to connect to these.https://medium.com/matter/heres-why-public-wifi-is-a-public-health-hazard-dd5b8dcb55e6