crypto implementation for small footprint devices

[Josh Richards]

* 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.

-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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