  As humanity struggles to contain the global COVID-19 pandemic, privacy
concerns are emerging regarding confinement, tracing and testing. The
scientific debate concerning privacy of the COVID-19 tracing efforts has been
intense, especially focusing on the choice between centralised and
decentralised tracing apps. The privacy concerns regarding COVID-19 testing,
however, have not received as much attention even though the privacy at stake
is arguably even higher. COVID-19 tests require the collection of samples.
Those samples possibly contain viral material but inevitably also human DNA.
Patient DNA is not necessary for the test but it is technically impossible to
avoid collecting it. The unlawful preservation, or misuse, of such samples at a
massive scale may hence disclose patient DNA information with far-reaching
privacy consequences. Inspired by the cryptographic concept of
"Indistinguishability under Chosen Plaintext Attack", this paper poses the
blueprint of novel types of tests allowing to detect viral presence without
leaving persisting traces of the patient's DNA. Authors are listed in
alphabetical order.

Cryptography and Security;Quantitative Methods