In this post, we illustrate how various techniques from privacy-enhancing cryptography, coupled with differential privacy protection, can be used to protect data privacy while enabling data utility. Of notable interest is the setting where there are multiple sources of relevant data, each having privacy constraints about data sharing. Privacy-enhancing cryptography is naturally suited to resolve challenges in multi-party and interactive scenarios, avoiding the sharing of data across parties. Its combined use with differential privacy broadens the set of problems that can be handled in a privacy protecting manner. In this post, we consider a use case related to private medical data, but the ideas can easily transfer to myriad other settings.