Benefits of using Commutative Encryption for privacy-preserving technologies were presented during ECIW 2009 in Lisbon, Portugal.. Leading researchers from all over the place were there including keynote speaker from NATO Ad-hoc Working Group for Maritime Force Protection.

[Commutative Cryptosystems paper]
[Presentation]
[Conference Website]
[Some photos from Lisbon [Some photos from Cabo de Roca