02:45 <DocScrutinizer05> basically the idea resp point of NFC is to sort-of 'replace' pairing like in BT by mere physical proximity. Augmented concepts involve e.g. shaking both devices (stacked) with one (same) hand in sync, creating a "shared secret" from acceleration

02:49 <DocScrutinizer05> I personally rather would have specified the mechanical interaction/linking between both devices as "knock one device with the other several times" - using timestamps and impact pulse shape this would allow shared secret without the need to hand your device to somebody else

02:52 <DocScrutinizer05> additionally one device could playback an audio (good old FSK-2400Hz code, or sth like that) the very moment both devices touch/impact, the other device can record this via mic and play the response on next impact

02:55 <DocScrutinizer05> when device receives a NFC signal trying to "pair" without subsequent "device-kiss" within a - say - 5s, it can yell an alarm for suspected intrusion attempt

03:06 <wpwrak> yeah, three knocks is probably all you really need. but hey, then those nfc chips would be useless again :)

03:07 <DocScrutinizer05> nah, you still need NFC to communicate between the two devices

03:14 <wpwrak> you could use BT for that, too

04:12 <DocScrutinizer05> afaik BT doesn't work in any 'open mode' (without pairing)

04:13 <DocScrutinizer05> so the missing features of NFC are the negative features of BT - funny, isn't it? ;-)

04:14 <DocScrutinizer05> also perfectly explains why e.g. Nokia uses NFC for BT pairing

04:54 <DocScrutinizer05> with BT you have an additional problem to select the right peer to pair to, when there are more than one other BT devices visible

04:56 <DocScrutinizer05> so even when you do the rather nonsensical "0000" pairing secret key stunt like nowadays many BT devices do, you still need to select *which* device to pair to

05:07 <wpwrak> you could just try all you can reach

05:08 <wpwrak> much like NFC does :)