These Wi-Fi networks are not very reliable. If they do not have a password , all information travels through them unencrypted, and can be intercepted very easily by any other device or computer connected to the same network . The only exception to this rule are web services that use an SSL security certificate and therefore encrypt the traffic between the user's computer and the server. When visiting Gmail or Twitter, for example, all the information that is sent and received reaches the navigator's computer encrypted.
Whenever possible, it is a good idea to connect to wireless networks with a password. The WEP password is weak and easy to figure out. Once guessed, any attacker will be able to see what is circulating on the network. The WPS password is more secure and recommended, if available.
If we enter open networks, such as those in some cafeterias and public spaces, we must take precautions. One of the basics is to use a virtual private network (VPN) that automatically encrypts all traffic that travels over the network . The other is to make sure that the web services and online stores we visit have an SSL security certificate installed (those web addresses start with https: // instead of http: //).
Image: Erin Pettigrew via Flickr / CC
