[11595] in cryptography@c2.net mail archive
Re: Smartcard in CD
daemon@ATHENA.MIT.EDU (lynn.wheeler@firstdata.com)
Sat Aug 31 18:26:37 2002
To: ray@unipay.nl
Cc: cryptography@wasabisystems.com, HugheJP@LOUISVILLE.STORTEK.COM,
Michael_Heyman@NAI.com, owner-cryptography@wasabisystems.com,
ptrei@rsasecurity.com
From: lynn.wheeler@firstdata.com
Date: Sat, 31 Aug 2002 14:15:47 -0600
iso format/standard is not only thickness but also flexibility .... even
some proximity (iso 14443) cards have had problem in the past with
flexibiity standards because flex tests would stress the coils in the
plastic and cause the connection to the chip to break.
ray@unipay.nl on 8/31/2002 4:57 arm wrote:
Contactless smart cards typically have coils in the card and the
magnetic field is generated by the reader.
Capacitive coupling is an alternative but requires more precise
alignment and thus doesn't really provide a proximity/vicinity card
like inductive coupling does.
On-board batteries are hard to fit on an ISO-format smart card but
maybe with the new ultra-thin batteries that's no longer the case.
Batteries are perhaps more suitable for a CD.
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