![]() In February, we sent several volunteers to 9 cities: Chicago, New York, San Francisco, Berlin, Barcelona, London, Taipei, Hong Kong and Seoul. (Figure 1: List of available wireless networks featuring both encrypted and unencrypted options.) Because of this, a key length of longer than 8 characters is strongly recommended. The length of a password is another important factor to its strength - a strongly encrypted communication with a short key length can still be cracked by hackers within a short amount of time. Hence, the use of a strong encryption such as WPA/WPA2 is suggested. However, the method and strength of these passwords matter: if a weak encryption method, such as WEP, is used, an attacker can simply crack the password and decrypt the device’s communication. To resolve this issue, many wireless networks use password protection. In the case of open wireless networks, the transmitted data are unencrypted and might be visible to others, as is shown in the screenshot below. While both options are available to users, the use of open, unprotected Wi-Fi networks has become increasingly popular across the globe. Behind the Scenes of Avast’s Global Wi-Fi Hack Experiment: How we collected and analyzed Wi-Fi data Wi-Fi and encryptionĭata transmitted over a wireless network can be either unencrypted or encrypted.
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