crypto implementation for small footprint devices
Phillip Zakas
pzakas at toucancapital.com
Tue Jan 9 19:53:30 PST 2001
I know RSA B-Safe stuff is made to fit onto cell phones and pagers. They
also are the public key vendor for DOCSIS cable boxes. Maybe they can help
you. www.rsa.com
pz
-----Original Message-----
From: owner-cypherpunks at Algebra.COM
[mailto:owner-cypherpunks at Algebra.COM]On Behalf Of Xiao, Peter
Sent: Tuesday, January 09, 2001 10:13 PM
To: 'Josh Richards'; coderpunks at toad.com; cypherpunks at toad.com
Subject: RE: crypto implementation for small footprint devices
-----Original Message-----
From: Josh Richards [mailto:jrichard at cubicle.net]
Sent: Tuesday, January 09, 2001 6:21 PM
To: coderpunks at toad.com; cypherpunks at toad.com
Subject: Re: crypto implementation for small footprint devices
* Xiao, Peter <pxiao at Liberate.com> [20010109 16:01]:
>
> I am currently looking for crypto implementation that can fit into small
> footprint (in the order of 50K or less) devices. Ideally, an SSL type of
> protocol meets my requirements but it is almost impossible to implement it
> within 50K even with selected cipher suites. So, I am looking for
> alternatives (either symmetric key or public key based). I was thinking
> about WTLS but looks like its implementation can not be significantly
> smaller than that of TLS since it is also based on Public Key cryptography
> (I am wondering how it fits into a cellphone). Can any one tell me what is
> the approximate size of the client implementation of WTLS. Also, would
> anyone send some pointers to me regarding what I am looking for.
How small of footprint? 50K (presuming you mean in currency) isn't really
a measurement of footprint size to me. :) Would something along the lines
of a Java iButton <URL:http://www.ibutton.com/> match your requirements?
It truly depends on what you need the device to be capable of...and I don't
just mean the crypto implementation but is this a device to be self-powered?
How do you need to interface with it? Etc.
The device is a DCT2000 set-top box with very limited footprint. Since the
box needs to run a lot of other applications, 50K is the space that we would
like to spend on the security purpose. The platform supports C interface.
-jr
----
Josh Richards [JTR38/JR539-ARIN]
<jrichard at geekresearch.com/cubicle.net/fix.net/freedom.gen.ca.us>
Geek Research LLC - <URL:http://www.geekresearch.com/>
IP Network Engineering and Consulting
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