crypto implementation for small footprint devices

Declan McCullagh declan at well.com
Tue Jan 9 23:00:23 PST 2001


It also might be worth checking out the elliptic curve apps that run
on Palm OS. --Declan


On Tue, Jan 09, 2001 at 10:53:30PM -0500, Phillip Zakas wrote:
> 
> 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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