003 – WiFi
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Description
WLAN – Wireless Local Area Network. Takes wired networks and makes them wireless. Above the data link later (layer 2), it’s the same as wired. Uses public use license radio frequencies. Usually 2.4ghz and 5GHz. Also 24GHz.
History
Hedy Lamarr
The Way I heard it
Podcast Link
ALOHA NET – 1971.
WaveLAN – 1991 – NCR/AT&T
IEEE 802.11 – 1997
Institute of Electrical and Electronics engineers
802.11n – 2009
802.11ac – 2013
2.4GHz vs 5GHz vs 60GHz
Long range 802.11 vs “Microwave” (licensed)
Don’t do speedtests on wifi!
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History
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“Within our grasp is the leisure of the Greek citizen, made possible by our mechanical slaves, which far outnumber his twelve to fifteen per free man… As we step into a room, at the touch of a button a dozen light our way. Another slave sits twenty-four hours a day at our...
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Authentication vs. Authorization
One-factor, “something you know”
Cleartext, hashes, salts
Entropy, complexity
https://xkcd.com/936/
Two-factor, “something you have, something you know”
Tokens, sms, totp
Back them up! Authy will do this for you.
Good/bad practices
Don’t use things that can...
Published 07/25/17
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