Topic: Smart keyless entry feature

[Micheal]

Some new cars come with a smart keyless entry feature, that unlocks the car when the person comes close to it, and when the driver gets in the car, he/she can just push a button to start the engine - the driver just needs to keep the remote control in his/her pocket.  While this looks cool, I'm concerned with the electro-magnetic radiation the pocketed remote control generates, close to the driver's most sensitive parts (that goes both for males and females).  There is no way to turn the remote off, so all the time the driver has it in his/her pocket, he/she gets hammered by harmful EMFs (it has been proven with muscle-strength testing that sources of electro-magnetic radiation like cell phones make the body go weak).

[ArticSteve]

You may have a point for men.  But for women they keep the smart key in their purses ALL THE TIME.

Time for shielded briefs.   

[xviper]

Although I believe those things utilize RF (radio frequencies) for communication, any electrical device will emit some levels of electromagnetic waves.  However, the level of these emissions is so small, even a cell phone puts out way more.  Think about the range of a cellphone compared to the range of one of these transponders.  Additionally, you get far more exposure to cosmic and UV radiation from nature on a daily basis.  Your exposure to and absorption of C-14 and gamma radiation on a day to day basis is also at a higher level.  Unless you are hypersensitive to such things, you needn't worry.  If you are, natural things around you would have given you a far higher dose by now, in which case, you might want to be wearing lead shorts.

[tpl]

I suspect that the remote is 90% passive and its the car that is radiating continuously.  The remote is a variety of RFID and will "reply" to the car when it is close enough to receive a signal.   Why?   Battery life in the remote as the remote has to be fairly small, smaller than a 407 transponder for example.   The remote is always on listening and only come to full power for a second or two when it detects a car nearby.

I'd also suspect that the interaction is intermittent when the remote is in the car and the car is running.   

What happens if you start the car with one of these things and then drive away without the remote. Does the car keep running?

[dr_spock]

It is probably an RFID chip device.   It can be active or passive.   If it has to use a battery then it is probably an active device that transmits constantly and it has greater range than passive devices.   They can use a passive device too, in which case your car will be constantly emitting an RF signal to power on the passive RFID chip in the key and listening for its response.   If you understand RFID, you can clone the key and steal the car.  Or jam the signal so your friend can't start or get in his car.  

Your cell phone probably emits more power than a smart key.  Either way, you're probably causing some excitement for the water molecules in your genitals.  It could be a bad thing if your cells can't disapate the excess heat.  There was a study done somewhere that found men who carry their cell phone in the front pocket had a lower sperm count.   Wearing a mini-skirt and hanging free should help with cooling.  

[Arctic_White]

What happens if you start the car with one of these things and then drive away without the remote. Does the car keep running?

Yes, it keeps on running.  Though it'll give you a signal saying "key not detected."  Car will not turn off and is still driveable.

At least this is the case for my sister's IS-350. 

[tpl]

It is probably an RFID chip device.   It can be active or passive.   If it has to use a battery then it is probably an active device that transmits constantly and it has greater range than passive devices.   They can use a passive device too, in which case your car will be constantly emitting an RF signal to power on the passive RFID chip in the key and listening for its response.   If you understand RFID, you can clone the key and steal the car.  Or jam the signal so your friend can't start or get in his car.  

Your cell phone probably emits more power than a smart key.  Either way, you're probably causing some excitement for the water molecules in your genitals.  It could be a bad thing if your cells can't disapate the excess heat.  There was a study done somewhere that found men who carry their cell phone in the front pocket had a lower sperm count.   Wearing a mini-skirt and hanging free should help with cooling.  

I think it is passive like a 407 transponder, just listens until it detects A car and then transmits and holds a short conversation to see if it is talking to THE car.  Probably resets an encryption key at that time. Once the car has detected its own key than they would converse every several seconds until the car is turned on and off again.  This would give a satisfactory battery life in the remote.

[xviper]

you're probably causing some excitement for the water molecules in your genitals.

Would this result in EXPLOSIVE DECUMPRESSION?