Intro to Access Control: Prox & Smart Cards

[@emmanuelobileye5643]

This was beautifully explained. Thank you for this video

[@kamakaziozzie3038]

I wonder if Charles Walton knew at the time his invention was going to change the world! That was one smart dude

[@joeb3300]

Nice overview of Prox & Smart. I do not believe that the mag strip reader has a "magnet that activates the bits" on the magnetic stripe - it contains a read head like in a tape recorder. As the magnetically encoded bits pass the head, analog pulses of “0” or “1” are generated. Other than that minor issue I thought that the video was excellent.

[@themistoclesnelson2163]

Thanks for the video

[@eriknilsson5048]

Nice video, but it would have been useful if they could elaborate on the authentication a bit more. The analogy is all well and good to paint the picture, but how does this actually work?

[@trainatech]

Maybe this video would help? kzbin.info/www/bejne/eIPTl4h_iLV4iq8

[@haq_se_sarcasm8840]

What if I use 2 smart card 1 which have access to room and 1 doesn't have access to the room ..... And if I stick these both cards back to back and try to access the room what will happen in. That case

[@burakgun3303]

There is read multiple cards at same time option in most of readers. You can search for it as anticollision. What would access controller do is about software of it. If it is designed as let user in if there is even there is one authorizated card, it will give permission. Otherwise -because of multiple card or readed at least unotherized card- controller will reject.

[@togaspin7518]

13.56MHz is actually more than 100 times as fast as 125kHz