Google, Apple and MIT have made headlines with announcements of contact tracing mobile apps in the wings. Their purpose is to identify contacts of people who test positive for COVID-19 so appropriate actions can be taken to stem its spread. However, a Cambridge University professor threw some cold water on those apps. The proposed apps all have voluntary aspects to them. That may address the privacy concerns such apps are raising, but it creates other problems, argued Ross John Anderson, a professor of security engineering.
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