I'm working on influencing security in embedded, e.g., writing and designing secure systems (comprehensively, starting with arch & code.) It's an educational effort with embedded ISVs and OEMs at every step, you can presume the market, if they're thinking of security at all, is currently buying into 'fire-walling' and 'obfuscation' approaches.
There are some interesting groups like We Are the Cavalry working on that as well.
Some fun uses of Raspberry Pi computers as air-gapped PGP / KeyStores and Hardware Tor routers. DIY info-theoretic secure communications platforms (opto-isolators and so on.)
On the topic of HWSec, I'm interested in detecting in-sil modification, allowing end-users to simply and easily verify their hardware in the same way that the OS community has become entranced with 'deterministic verifiable builds'.
-Travis