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Tri Teq Locks

Tool recommendations, information on your favorite automatic and/or mechanical lockpicking devices for those with less skills, or looking to make their own.

Tri Teq Locks

Postby Crypto » Wed Feb 02, 2005 6:53 am

I was wondering how the locksmiths open this kind of lock. Its called the Tri Teq system using a remote control to open the lock. I heard that these new locks are on the pepsi and coke machines in the US. Are there any locksmiths out there that have ran into this type of lock yet. I would like to know if there is a way to pick or send infrared signals to these types of locks. Any help with this type of lock would be appreciated.
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Postby Uisgdlyast » Wed Feb 02, 2005 8:35 am

when the search on this site doesnt work google always does a good job.

From what i read you can't "pick" these locks, they monitor the people that use them and shut off the signal if the person is not on duty... unless your really good with electronics and IR(if that is what they use) you won't get in.. but might i mention thermite would work(just kidding)

Google it, these things won't be easily opened
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Postby Rath » Wed Feb 02, 2005 11:02 am

get ur self a nice diamond bit and a powerful drill! if finessing it dosent work go for the kill
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Postby skold » Wed Feb 02, 2005 3:17 pm

If a remote can create a signal, the signal can be replicated..

Probably very easily with the right equipment.
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Postby kehveli » Thu Feb 03, 2005 2:31 am

skold wrote:If a remote can create a signal, the signal can be replicated..

Probably very easily with the right equipment.

It's not always that easy (opening remote control locks). Of course the signal can be replicated, but it is a different question if the same code will work.

Although I have zero knowledge of this specific lock, I think that un-replicatable-by-recording-IR-signal (by current standards) key&lock can be made and is possible already out there. It's all a matter of cryptography.

Probably a simple challenge-response based key&lock pair would make it computationally infeasible to calcuate the correct code.

It just needs proper implementing (the lock can for example be limited 2tries/sec and lock it self for 5mins after 10 unsuccesful auth attempts within a short period of time). The key may also be protected so it does not respond to signals a button is pressed on it. This way an attacker can not obtain valid challenge-reponse pairs while the lock owner is shopping etc.

This post only appiles to the IR communication. Of course one could use a rotary tool to bypass the lock. Alternatively he/she may steal the key, but this was not the point.
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Postby MrB » Thu Feb 03, 2005 3:07 am

keyveli is quite right.

Any lock that opens by transmission of an electronic code can be made infinitely more difficult to "pick" than a mechanical lock.

It is possible for the electronic key to contain a secret, and to prove to the lock that it knows that secret, without actually giving away the secret itself.

This means that even if you listen to what the key says to the lock, simply repeating what the key said before won't make the lock open next time.

The rolling code system used by car remotes is a classic example of this.

Imagine a book of random passwords. Each time you give a password to the guard at the gate, you cross that password off your list, and the guard remembers what password you gave. Next time you meet the guard, you have to give the next password in the list. The guard knows what password that should be, because he remembers the last password you gave. But anyone who doesn't have your secret book will be stuck, even if they overheard you giving the password before.

It's a bit more complicated than that in practice, but you get the idea.
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