Questions tagged [smartcards]

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How does a TAP card work? [duplicate]

TAP cards have been around for a while now, but there seems to be very little information around that explains how they work, particularly by the LA transit system. Here is an article saying that ...
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1answer
299 views

How does a Smartcard work? [duplicate]

It appears there is more than just flash memory on Smartcards. Presumably there is also some sort of microprocessor. So then along comes this article: Crippling crypto weakness opens millions ...
3
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1answer
218 views

Finding timestamp in hex data

I'm reading stuff from public transport cards and I've got this hex data which is an usage history. I believe that these records contain timestamp or date in some format (but I'm not sure), but I ...
3
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1answer
363 views

How to set-up a lab for reversing a mass transit ticketing system?

I recently stumbled on a talk from Ruxcon 2012 explaining the reverse of a mass transit ticketing system. Basically, they focused on paper tickets reverse engineering with a skimmer and a lot of ...
6
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1answer
798 views

What is fault-injection reverse engineering? What are the techniques involved?

Trying to extract data from the hardware is often quite difficult (especially when dealing with smartcards). Fault-injection attacks allow to guess cryptographic keys based on the propagation of ...
5
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1answer
1k views

What is SCARE (Side-Channel Attacks Reverse-Engineering)?

When reversing smart-cards, the side-channel attacks are known to be quite effective on hardware. But, what is it, and can it be used in software reverse-engineering and how?