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When using open source SSH, you must also use open source SSL -- what is
that 600kb of memory?

Mocana (www.mocana.com) has an SSH solution that is 70kb in size, can run
with SSL or by itself. It's fast, reusable, scalable and though it costs
more to buy up front, it is a lot cheaper to use across multiple
products/multiple projects than open source (because it is reusable, an new
engineering effort is not required for EACH new product - that saves you
engineering dollars and time....).

Mocana SSH and SSL (50kb) can be used on any OS, and any processor -
available in both client and server.