Re: RNG in a Smart Card

Enzo Michelangeli (em@who.net)
Wed, 29 Jul 1998 08:24:02 +0800

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By the way: ibutton's order page, on www.ibutton.com, explicitly mentions
shipments to countries other than US and Canada. Does that imply that those
devices have provision for key escrow?

Enzo

-----Original Message-----
From: Ben Laurie <ben@algroup.co.uk>
To: Mike Rosing <eresrch@msn.fullfeed.com>
Cc: CodherPlunks@toad.com <CodherPlunks@toad.com>
Date: Tuesday, July 28, 1998 5:18 AM
Subject: Re: RNG in a Smart Card

>Mike Rosing wrote:
>>
>> On Mon, 27 Jul 1998, Werner Koch wrote:
>>
>> > What about Dallas Semiconductor's iButtons; afaik this more than just
>> > a silicon die?
>>
>> I was wondering too. I'm looking in their data book and I don't see
>> anything about RNG's. It's mostly an ID system, they use a laser to burn
>> in an ID code into each button. They make a big deal about each button
>> being unique, not so much about the crypto strength. Lots of different
>> parts to choose from too. Mostly 48 bit registration numbers, then
>> choices of NV RAM or EPROM, organization of data, and scratch pad.
>>
>> Looks pretty neat, but does not appear to have an RNG. My data book is
>> dated 94-95, so they may new stuff now.
>
>The Crypto iButton has various functions for generating randomness. For
>example, RandomFill, and SALT. I can't find anything that says where the
>randomness comes from, though. I think I'll ask my contact there...
>
>See http://www.ibutton.com/Crypto/script/index.html.
>
>Cheers,
>
>Ben.
>
>--
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