London Banter - View Single Post

[email protected] · January 4th 16, 10:27 AM posted to uk.transport.london

On Mon, 4 Jan 2016 10:15:37 +0000
Someone Somewhere wrote:
On 04/01/2016 09:48, d wrote:
On Sun, 03 Jan 2016 17:32:16 +0000
Paul Corfield wrote:

This is simple. Oyster cards hold value on the card and are read,
processed and then written back to with an updated balance and journey
history. In order to work out a PAYG fare or extension fare then you

I'd love to know how many hacked Oysters or DIY cards are out there that
can be loaded with a random value and/or don't decrement the value.

--
Spud

Presumably the "read" part of the above has some form of linked
reconciliation which quickly identifies and blocks those cards?

Not when the original MiFare was hacked they didn't. Anyway, if its DIY
card they could easily program in a rolling Id number. I doubt if the gates
keep a list of every single valid card thats been issued, probably just
blocked ones if anything. Presumably the version 1 cards are still valid so
that hack could still be used. Which probably means it is.

--
Spud