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Security of Oyster Cards
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November 18th 03, 09:55 PM posted to uk.transport.london,alt.2600,sci.crypt
Neil Williams
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First recorded activity at LondonBanter: Jul 2003
Posts: 2,796
Security of Oyster Cards
On 18 Nov 2003 13:40:14 -0800,
(Gareth
Davis) wrote:
Pretending you have a valid pass on a line where you know it will not
get scanned is the real weakness at the moment, and it is this that
makes the whole system a bit of a joke.
The solution to this, for the short term, is to issue a paper ticket
with the electronic one. For online transactions, this could be sent
through the post or maybe even collected from a ticket machine?
MK Metro issue a "validation receipt" from the bus ticket machine when
a pass is loaded onto one of their contact-type smartcards. This is
required when using one of the many Council-subsidised services not
operated by MK Metro on which the tickets are valid. (I do wonder,
out of interest, if MK Metro was involved in any research prior to
implementation - are there any other bus operators in the country
using a similar system, I wonder?)
Of course, this won't work for pay-as-you go - but before that can be
implemented for National Rail, there'll need to be as good as 100%
reader coverage anyway.
Neil
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