Google and Apple provided assurances that the data generated through the apps—people’s movements, who they might have come in contact with, and whether they reported testing positive for COVID-19—would be anonymized and would never be shared with anyone other than public health agencies.
But The Markup has learned that not only does the Android version of the contact tracing tool contain a privacy flaw, but when researchers from the privacy analysis firm AppCensus alerted Google to the problem back in February of this year, Google failed to change it. AppCensus was testing the system as part of a contract with the Department of Homeland Security. The company found no similar issues with the iPhone version of the framework.
“This fix is a one-line thing where you remove a line that logs sensitive information to the system log. It doesn’t impact the program, it doesn’t change how it works, ” said Joel Reardon, co-founder and forensics lead of AppCensus. “It’s such an obvious fix, and I was flabbergasted that it wasn’t seen as that.”