  In order to make spoken dialogue systems (such as Amazon Alexa or Google
Assistant) more accessible and naturally interactive for people with cognitive
impairments, appropriate data must be obtainable. Recordings of multi-modal
spontaneous conversations with vulnerable user groups are scarce however and
this valuable data is challenging to collect. Researchers that call for this
data are commonly inexperienced in ethical and legal issues around working with
vulnerable participants. Additionally, standard recording equipment is insecure
and should not be used to capture sensitive data. We spent a year consulting
experts on how to ethically capture and share recordings of multi-modal
spontaneous conversations with vulnerable user groups. In this paper we provide
guidance, collated from these experts, on how to ethically collect such data
and we present a new system - "CUSCO" - to capture, transport and exchange
sensitive data securely. This framework is intended to be easily followed and
implemented to encourage further publications of similar corpora. Using this
guide and secure recording system, researchers can review and refine their
ethical measures.
