What I want to learn a little about Wi-Fi encryption methods and encryption keys

"Clearing" I don't know "of home Wi-Fi!" Serialized article list

An example of a wireless setting screen on a Buffalo Wi-Fi router.You can see that there are encryption method and key related settings

Encryption method details and recommended settings

[* 1] …… In WPA2-PSK, which will be described later, an encryption key using a hexadecimal 64-digit hash function is generated without using the set pre-shared key as it is, and encryption is performed based on this. .. In addition, this key changes at set intervals. It's kind of confusing, but the pre-shared key is a key that is set and decided for convenience, and the key that is actually used is different, and by changing it regularly, it is made stronger against hacking by reading data for a certain period of time. There is.

[* 2] …… For wireless LAN, CCMP, a protocol based on AES, is used, but the name of AES is generally used, and AES may appear on the setting screen. many. If CCMP is displayed, select it. Sometimes written as "CCMP (AES)".

[* 3] …… These WPA2 and WPA are sometimes written as “WPA2-PSK” and “WPA-PSK”, but they are the same for household products. In fact, WPA2 (WPA) has home use (personal) and office use (enterprise), and PSK (Pre-Shared Key) strictly describes the method made for home use. Pre-shared key means a key in this way. It is written as "WPA2 Personal" on macOS, iOS, and Windows.

[* 4] …… The Internet communication service for the Nintendo DS ended in 2014. By the way, Nintendo 3DS supports WPA2. Also, note that Nintendo Switch is compatible with WPA2 (AES), and WPA / WPA2 using TKIP and SSID are not compatible with stealth settings, "AOSS" and "Easy Wireless Start".