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Author Topic: iButton / Dallas Key Marcial Feliciano Ramos Expert Film Handler Posts: 108 From: Puerto Rico Registered: Oct 2003 posted 09-29-2012 04:12 PM                     Where can I find/order various dallas keys with the same number? Thanks in advance.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 09-29-2012 04:51 PM                     You can't. One of the features of these things is that the numbers are unique. You can add up to 8 (I think) Dallas keys to a Barco projector, so if you order another one just add it. Barco sells them but pretty expensive. You can find them online, and I assume any iButton will work... but I have never bought one and tested it. There is some sort of error checking built in to the number, if you enter a digit/letter wrong the projector says "invalid". Hopefully Barco hasn't reserved a range and will refuse a key you didn't buy from them.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 09-29-2012 08:34 PM                     Barco permits up to 5 per machine. We always take 5 (assuming a 5 plex or greater) and assign them to each projector. That way any of those 5 keys will work on any machine. quote: Dave Macaulay Hopefully Barco hasn't reserved a range and will refuse a key you didn't buy from them. Does it really matter? After all the super secret security code is awful similar to the combination on my luggage.  |  IP: Logged Marcial Feliciano Ramos Expert Film Handler Posts: 108 From: Puerto Rico Registered: Oct 2003 posted 09-29-2012 10:14 PM                     Thanks. I have my own key and the other technicians too but since we are in the process of the rollover to digital we were looking for a simple and fast way to put our keys and not going projector by projector doing it. Is there a simple way or that's the only way?  |  IP: Logged Ken Lackner Phenomenal Film Handler Posts: 1907 From: Atlanta, GA, USA Registered: Sep 2001 posted 09-30-2012 11:45 AM                     quote: Dave Macaulay Hopefully Barco hasn't reserved a range and will refuse a key you didn't buy from them. quote: Brad Miller Does it really matter? After all the super secret security code is awful similar to the combination on my luggage. He's not talking about the code you enter on the projector to reset the security. He's talking about the s/n of the Dallas Key. Can you buy a Dallas Key from anywhere, or will a Barco only recognize ones sold by Barco?  |  IP: Logged Joe Elliott Master Film Handler Posts: 497 From: Port Orange, Fl USA Registered: Oct 2006 posted 09-30-2012 12:34 PM                     Looks like hacking and copying one would not be an easy task, although it is do-able. I did find this however, which is very interesting. Creating an electronic lock that opens via Dallas key. Dallas lock I ran across this also. A hackers den that uses a Dallas lock. Hackers den edit: I was just thinking . . . what about booth doors with all dallas key locks.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 09-30-2012 02:51 PM                     quote: Ken Lackner He's not talking about the code you enter on the projector to reset the security. He's talking about the s/n of the Dallas Key. Can you buy a Dallas Key from anywhere, or will a Barco only recognize ones sold by Barco? I am well aware of what he meant. I was merely pointing out that as the super secret code is such a joke, that whole Dallas key thing really isn't going to stop anyone. Sure the code can be changed, but seriously...why bother?  |  IP: Logged Ken Lackner Phenomenal Film Handler Posts: 1907 From: Atlanta, GA, USA Registered: Sep 2001 posted 10-01-2012 07:57 PM                     Well, if you don't have access to a Dallas Key that has been programmed into that projector, than you can't reset security on that projector. So the tech can keep the key on his key ring or keep it locked up or something.  |  IP: Logged Yinghong Wu Film Handler Posts: 32 From: Suzhou Jiangsu China Registered: Apr 2012 posted 10-01-2012 10:25 PM                     What's the meaning of dallas key?  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 10-01-2012 10:29 PM                     If you have a Dallas key and the st password (which is not exactly top secret) you can add the key to the projector in a minute. The hardest part is reading the tiny numbers off your key. The security spec requires that someone is at the projector to reset any physical tamper events, this can not be done remotely. Christie makes you enter a (well known) password and push a button. Barco has the Dallas key and a (also well known) password. The deeper security processes make accessing unencrypted image data rather difficult even if you open the "secure compartment", so this step is somewhat redundant. The security system seems to have been designed by someone who was fired from the NSA crypto division for overdoing it.  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 10-01-2012 10:56 PM                     quote: Dave Macaulay Barco has the Dallas key and a (also well known) password. What good does the Dallas Key do? If anybody who knows the not-so-secret password can get access to the machine, they can program in their own random Dallas Key, do their dirty work then throw the key away or, better yet, hide it in somebody else's desk and incriminate them. What's next? A retinal scanner?  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 10-02-2012 12:41 AM                     Its just like the TSA, a false sense of security.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 10-02-2012 07:13 AM                     Whatever the security violation reset process is, it's a "lock the barn door, someone stole the horse" situation. The primary security task is to prevent encrypted content from being decrypted from the distribution data to play on a non-compliant viewing system, or playing on a compliant viewing system without authorization, or playing on an authorized compliant viewing system without all the secondary security systems working. The secondary security systems assume a copy has been made, and are there to help track down the source of any copies that are distributed publicly. The video and sound watermarking shows the time the copied show was played and what system played it. The simplest way to copy a movie is to make a video using a camera capturing the screen image. Anyone can do this at apublic show with some risk of apprehension, but the video and sound quality will be less than excellent. The watermarking will locate where and when it was done but if you got out of the place without getting caught you are pretty much untraceable. If you have free access to a theatre you can do this in private in an empty room although the watermarking will tell when it happened, so you should prepare a good alibi locating you elsewhere then. You can get 5.1 or 7.1 sound from the projection system quite easily. Video quality will be vastly reduced from the original DCP data but still it's quite nice if done properly. If you have a prologic encoder and a HD camcorder, you can prepare a damned good master copy ready to be burned to Blu-Rays or DVDs that can be on the street within an hour. Apparently there were DVD copies of some movies made where the source was clearly an screen capture from a digital system, but without watermarking. That suggests someone modified the TI interface board to bypass the watermarking system - so now we get to pay more for the "gore board" tamperproof" interface boards. If you want the best quality, the projector's internal encryption of the video data going to the light engine is the weakest in the system but that data already has the video watermarking. Plus there's a LOT of data: it in uncompressed at this stage. I've heard from fairly good source that if you acquired the data from the light engine interface you could decrypt it... but unless you happen to be the NSA it would take a few months (when the movie will already be out on home video) plus the data capture equipment and computers or computer time for decryption that quickly are very expensive. The data on the distribution drive (all drives are the same, there is no watermarking of drive data to the best of my knowledge) has much more secure encryption - it would take several years to crack with current generally available technology - unless, again, you're the NSA or you have a supercomputer (or a few) and the people with cryptographic skills to approach the problem. However, if you do have those, they probably cost considerably more than any movie's total gross let alone whatever selling pirated copies could get you. Anyone with such resources isn't stupid and wouldn't waste them on cracking movies. Assuming someone has found a way to get image data out of the light engine or the circuit boards and use it, the secure area tamper reset process requires someone to be at the projector and the projector security logs will show exactly when the reset was done: the CSI team would simply find out who was there at that time... and there'd be the uncomfortable interview at HQ where the evildoer would eventually confess and head for death row.  |  IP: Logged Ken Lackner Phenomenal Film Handler Posts: 1907 From: Atlanta, GA, USA Registered: Sep 2001 posted 10-02-2012 09:42 AM                     Bahahaha! I was wondering if that was all leading up to a point.  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 10-04-2015 02:47 AM                 It has been 1096 days since the last post.  |  IP: Logged

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