The InChi group are running a short survey to find out more about the use. It would be really helpful if you have 2-3 mins to complete the survey.
The International Chemical Identifier (InChI) is a textual identifier for chemical substances, designed to provide a standard way to encode molecular information and to facilitate the search for such information in databases and on the web. InChIs differ from the widely used registry numbers in three respects: firstly, they are freely usable and non-proprietary; secondly, they can be computed from structural information and do not have to be assigned by some organization; and thirdly, most of the information in an InChI is human readable (with a lot of practice). The InChIKey is a fixed length (27 character) condensed digital representation of the InChI that is not designed to be human-understandable.
More details are on the InChiTrust Website https://www.inchi-trust.org.