(Apologies for cross posting and if the RDA posting is barking up the wrong tree (and if so please direct me).)
As part of the UK Jisc Research Data Spring (http://www.jisc.ac.uk/rd/projects/research-data-spring) I have got involved in planning a project that if funded will look at classifying sensitive research data and mapping this onto storage options for these data at different parts of the research data life-cycle. The main output from this work would be some guidance documentation aimed at UK institutions and researchers that are to be disseminated by the UK Digital Curation Centre. The early phases of the work involve surveying the landscape and coming up with some clear and usable definitions. Community engagement will be key to the success of this project if it gets the go ahead. We are compiling a list of individuals and organisations to liaise with and hope that this sparks some interesting from here.
I should hear back in about a weeks time if the initial phase of this work is selected to be funded. I hope you are interested enough to have a look and feedback as appropriate on the draft project plan that is available for comment on Google Docs:
Managing Sensitive Data
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