Electrek article regarding improved cryptography key fob and PIN

[FloridaGary]

Electrek article regarding improved cryptography key fob and optional PIN to Drive feature. Older Model S and all Model 3's.

Tesla is rolling out extra layer of security with ‘improved cryptography’ key fob and optional ‘PIN to Drive’ feature

 

[Shaggy]

I'm sure we cannot get any credit back on turning our working FOBs in exchange. I wonder if I can have one of each...

 

[Reeler]

I would presume that Tesla is replacing our fobs for free. Especially since they kept selling them for the Model S even though the Model X ones were fixed far earlier.

 

[FloridaGary]

I spoke to Tesla Svc Center and they did not confirm new keyfobs for those of us with older Model S vehicles. Not sure who to believe.

 

[fasteddie7]

Got the PIN to drive, going to find out about the key fobs

 

[brkaus]

I would presume that Tesla is replacing our fobs for free. Especially since they kept selling them for the Model S even though the Model X ones were fixed far earlier.

Doubt it. Is every other manufacturer replacing all of their older keys based on similar tech?

 

[Snowstorm]

I have no expectation for Tesla to replace old fobs. It would be good if here was an option to buy new fobs, but there should not be any expectation of free.

Now, the free PIN to drive upgrade is great and an example on how Tesla is different in a better way. No other mfg would be able to do this upgrade, and even if they can, their dealer network would scream to have you take it in for service.

 

[FloridaGary]

Got the PIN to drive, going to find out about the key fobs

FastEddie - What software update did you receive that included the PIN to Drive option?

 

[fasteddie7]

FastEddie - What software update did you receive that included the PIN to Drive option?

32.4 but apparently there are 3 versions of it. I also see that the screens have a "night" mode that shift out blue at night. I'll catch it on video to make sure I'm not crazy.

 

[mspohr]

I would presume that Tesla is replacing our fobs for free. Especially since they kept selling them for the Model S even though the Model X ones were fixed far earlier.

What makes you think you will get hardware upgrades free?

 

[Snowstorm]

32.4 but apparently there are 3 versions of it. I also see that the screens have a "night" mode that shift out blue at night. I'll catch it on video to make sure I'm not crazy.

You mean like a more warm white yellow tone like iPhones? I hope that is user selectable.

 

[fasteddie7]

You mean like a more warm white yellow tone like iPhones? I hope that is user selectable.

Yes. Only the binnicle display and now that I look at it again, I might be seeing things. It just seems warmer, I'll have to take some photos and compare them to older ones.

 

[pjw65]

Insecure Key Fob uses 40bit "Security" Key:
Fast, Furious and Insecure: Passive Keyless Entry and Start in Modern Supercars
Disable Passive Entry does NOT help!!
Cryp·tomer on Twitter

Anyone got information from Tesla how much a hardware upgrade will cost?

 

[MP3Mike]

Anyone got information from Tesla how much a hardware upgrade will cost?

What makes you so sure it won't just be a firmware update on your existing fobs?

 

[pjw65]

What makes you so sure it won't just be a firmware update on your existing fobs?

Because in the linked article above they say it's a Texas Instruments Chip, which only can do 40bit:

However, Tesla did not design this system themselves but purchased it from Pektron. According to the Federal Communication Commission (FCC) equipment authorization database, Pektron also designed keyless entry solutions for manufacturers such as McLaren, Karma and Triumph. The internal pictures included in the FCC database show that all these systems use the same Texas Instruments TMS37F128 chip.

 

[brkaus]

Interesting the hacking paper says they are using DST40. The spec sheet for the TI chip says it supports DST80.

If I am reading all this correctly.

 

[pjw65]

Interesting the hacking paper says they are using DST40. The spec sheet for the TI chip says it supports DST80.

Seems, that Tesla used an even older Chip or just used this one wrong.
In another Article by Gizmondo, Tesla says it costs $150 and it needs a software upgrade:

Tesla informed us that replacement key fobs cost $150.
...
A corresponding software update for all Model S vehicles allows customers with cars built prior to June [2018] to switch to the new key fobs if they wish.

A software upgrade only would never cost $150, I think they will replace the key fobs (or part of it).

 

[E-Ryc]

It sounds pretty clear - the (free) sw update teaches the car how to speak to new fobs. If you really want that new fob, you pay (my guess is $150 per piece, not for both of them).

 

[brkaus]

I am curious, how many other cars use the same TI chip? Do they have the same risks?

I know it's more glamorous to hack a Tesla, but how widespread is this problem? The article listed some high end cars... but what about the others?

 

[mongo]

Interesting the hacking paper says they are using DST40. The spec sheet for the TI chip says it supports DST80.

If I am reading all this correctly.

You are indeed. And that is the HW module, using a SW wrapper, you could extend it...
80-Bit DST80 Security Authentication Coprocessor
80-Bit Authentication Key Length