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Encryption is the process of transforming plaintext using a cipher to make it unreadable to anyone except those possessing the key.

1
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No. (assuming they're not using WEP) Under 802.11i security, even with everyone using the same PSK, the actual on-air encryption key is different for each station-AP pair. The "four-way handshake … " uses a nonce from both the AP and the station (your laptop) to make a unique encryption key. There is a potential attack if this exchange (both messages) are observed. Note that this only protects …
answered Jun 10 '17 by DaveM
2
votes
a process called the 4-way handshake to authenticate and establish the temporal encryption keys. The Wikipedia pages for WEP and 802.11i give a complete discussion with diagrams. …
answered Mar 23 '12 by DaveM
2
votes
Several other people have contributed answers on the technical issues you are having trouble understanding. But I notice at least two poor assumptions in your question(s). 1) The German Enigma machi …
answered Mar 28 '16 by DaveM