Credit Card Teardown: Secure Computing
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- čas přidán 31. 12. 2018
- A look at a modern credit card and the nifty electronics it contains. On the surface a typical micro controller, but as one looks closer all sorts of security features become apparent.
- Věda a technologie
Fricking awesome. So much time spent showing us this cool tech. Thank you so much for doing this. I just don’t have the time or comfort with acids to do this.
Thanks again. Keep up the great content.
I would be interested in why the silicon shapes become a gate or a memory area and such. I’m not sure if others would like that but I would watch it and share it a ton.
Modern ICs can containe billions of transistors. This credit card probably contains several millons already. Building blocks such as bits of RAM or an adder or a register for example are made of smaller building blocks called "logic gates". Any circuit can be made out of three gates: AND, OR, NOT. the AND gate ouptuts a 1 if both of its inputs are 1. The OR gate outputs 1 if at least one of its input is 1. The NOT gate outputs zero of its input is one and vice versa.
I absolutely agree. This is something I would love to do myself. Definitely keep these coming!
Thank you for making this; it's extremely interesting to see what runs these credit cards now. So much for magnetic strips and carbon-copy paper haha.
Yet, most cards these days are backward-compatible with not only magstripe (which is still around) but even have raised numbering for use with carbon-copy. I wonder if carbon-copy is actually still in use anywhere, or if the raised numbers are just around because of people's expectations of what a genuine card should look like.
Gameboygenius the raised embossed numbers could be a security feature to prove the card is genuine.
@@jakp8777 Yeah, that's what I call expectations. Punching numbers into plastic isn't exactly high tech, and any card scammer can easily get a number puncher. Arguably printing the numbers instead of punching them would actually be safer (more difficult to duplicate for a medium effort scammer - needing a printing facility instead of a hand-operated mechanical puncher). Switching to unpunched cards on the other hand would cause confusion for years to come as cards are replaced, which could cost more in PR than the cost reduction in producing the cards.
Also, non-raised numbers get erased over time (happened 2 of my cards)
About 5 years ago i had dispensed fuel at a petrol station in the uk and the tills went down when i went to pay. They got the zip-zap machine (carbon copy) out.
My kid works for a company that takes this technology one step farther. They make credit cards not only with "The Chip", but also that chip is inactivated until you punch in your PIN...... on the credit card itself. They are selling them in Asia, South America and certain parts of Europe but the last I knew they were not approved in the U.S.A. yet. The advantage of course is that even if you lose the card or it is stolen it is worthless until you enter the PIN.
What do you mean "takes this technology further". This is generally how signature cards work. To unlock a private key you have to present a valid PIN. Then you can use whatever signing operation with that key. And if you can't present a valid PIN then the signing operation fails should you try it anyhow. And that was already way back in the nineties for example with cards like the Gemplus GPK series.
I've had one of these on my workbench for a few months and I've been meaning to look at it once I got a microscope. I guess I won't bother, now. 8)
I love your microchip teardowns. It's really interesting how these modern designs compare to the old, single-layer metal dies from the 70's and 80's I normally study.
Thank you. I had no idea that slice of plastic held so much. Thanks for sharing.
Holy cow, that's quite amazing.
Very fascinating!
Wow, nice teardown
Thanks for sharing👍😀
The Chaos Computer Club from germany did something similiar 10 years ago with EC cards. They tried to reverse engineer the encryption. Interesting read. :)
Some if not all smart cards have a JVM in hardware for running code. Phone SIMS are ones that I know do contain a JVM.
stonent They may have something that is similar to arm's "Jazelle" mode which would makes it a (limited) JM then, and not a JVM. To think this little piece of silicon runs a GlobalPlatform OPEN or confirming card OS and applications. What is also likely is a non-java byte code interpreter just like in the 3gpp usim specs.
Useful video 👍
Very interesting. Thanks.
Thank you for your good vids
Wow first person to explain how credit card rfid works. I’m acting much more confident now.
Would it be possible to install this into a ring and wrap the wire around the ring?
My credit card is so old it has vacuum tubes.😆
Woah woah hey amazing!!!
Thanks for another great video 🙂! Isn't it a coil, and not an antenna?
Any wire is an antenna.
This type of cards use a coil-antenna and it is designed for near field communications. That means that the cardreader has a coil antenna as well and they are closely coupled in the near field. There is still significant emissions from such a setup if you target your antenna right so the communication is made in such a way as to encrypt the traffic as well. Typical range is 2-7cm but you can get systems pushing this to 10-15cm in the same frequency and antenna size range.
Oh Yeah This Amazing And Increíble 😮😮😮
I see roads, buildings and farms.
Will it work with out the antenna ?, possible to remove antenna?
It will work but not wireless
Will the chip still function if I dissolve the card in acetone? It looks that all the functional components are metal. I'm working on a project to rehouse the contactless chip of a card.
Did u ever find out if it still works ?
?
Unlikely. These things have booby traps that will destroy sensitive information to prevent exactly this sort of thing.
...and after enraging the establishment with his credit card teardown, electronupdate was never heard from again...
As Mr. Spock used to say; "Fascinating".
👍🇫🇷
how is it powered?
The reader puts out bursts of RF, that’s picked up by the antenna on the card and the chip ‘loads’ the signal down to signal back. It doesn’t actually transmit, just shunts power. TLDR; Magic.
When the credit card is inserted into the card reader the reader applies power to specific contacts and the other contacts are for data.
It is different when used wirelessly that is more like how a phone charging pad works.
I think it's passive induction. The antenna powers the very low voltage chip. I think that's part of why it only works within a certain distance. I dunno, i'm likely very wrong.
Power is supplied via its pins on ATM's or POS machines and such, and the contactless section gets powered by the RF field and it charges the capacitors in the chip, so it can do calculations for a limited amount of time. It is the RFID technology.
@@devrim-oguz The RFID reader continuously sends power, the reader sends data by very briefly interrupting the magnetic field, while the card sends data by varying ita current consumption (load modulation)
Wow... I'm used to people yelling "FIRST!" on my channel :-)
First. Wait that can’t work on a reply can it. Bummer.