Hence, in this use case we consider the case of a patient who has already sequenced his or her DNA, that is, who has stored the DNA sequencing string (PHR data) in the PHR system. The patient would like to run different sorts of genomic data analyses on the DNA string. However, the patient is also concerned about the improper usage that the application software provider could make of the data. Data made available by patients can be sold to other commercial institutions, after which further control becomes very complicated. If leaked for instance to employers or insurance companies, the data may unwillingly influence the patient relationship with such institutions.