BBC Moneybox - contactless hiccups
chris-ukcrypto at lists.skipnote.org
Mon May 20 10:49:44 BST 2013
On Mon, 20 May 2013, Roland Perry wrote:
> What if the contactless credit card is adjacent to an Oyster or ITSO card in
> your wallet?
$workplace uses a mifare card based entry system (wave your wallet
containing card at door reader). Last year, I started frequently having
problems opening doors. Then I realised this was due to my bank having
issued a new visa card, which has the "pay-by-wave" logo (looks a bit like
a WiFi symbol). Removing this visa card from my wallet reinstated by
ability to open doors.
I had some idea the protocols specifically catered for multiple cards, and
that the door card reader would be able to "select" the card it wants to
talk to. But if so, this doesn't seem to work very well (for me).
More information about the ukcrypto