Contact tracing apps are designed to help public health authorities track and contain the spread of COVID-19 or any other diagnosed virus by notifying users who have been in close contact with an infected person. However, these apps also raise privacy concerns, as they collect and process sensitive personal data, such as health status and location information. Therefore, contact tracing apps should follow the principles of privacy by design and default, which means that they should incorporate privacy measures into their development and operation, and offer the highest level of privacy protection to users.

Some of the privacy measures that should be considered when designing contact tracing apps are:

Data retention: Contact tracing apps should only retain the personal data they collect for as long as necessary to achieve their public health purpose, and delete or anonymize the data afterwards. Data retention periods should be clearly communicated to users and based on scientific evidence and legal requirements.

Use limitations: Contact tracing apps should only use the personal data they collect for the specific and legitimate purpose of contact tracing, and not for any other purposes, such as commercial, law enforcement, or surveillance. Use limitations should be enforced by technical and organizational measures, such as encryption, access controls, and audits.

User confidentiality: Contact tracing apps should protect the confidentiality of users’ personal data and identity, and not disclose them to third parties without their consent or legal authorization. User confidentiality should be ensured by technical and organizational measures, such as pseudonymization, aggregation, and data minimization.

Opt-out choice, on the other hand, is not a privacy measure that should be considered when designing contact tracing apps, as it would undermine their effectiveness and public health objective. Contact tracing apps rely on voluntary participation and widespread adoption by users to function properly and achieve their purpose. Therefore, offering users the option to opt out of the app or certain features, such as data sharing or notifications, would reduce the app’s coverage and accuracy, and potentially expose users and others to greater health risks. Instead of opt-out choice, contact tracing apps should provide users with clear and transparent information about how the app works, what data it collects and how it uses it, what benefits and risks it entails, and what rights and controls users have over their data. This way, users can make an informed and voluntary decision to use the app or not, based on their own preferences and values.

References:

[IAPP CIPP/US Study Guide], Chapter 2: Privacy by Design and Default, pp. 35-36.

[IAPP CIPP/US Body of Knowledge], Section II: Limits on Private-sector Collection and Use of Data, Subsection B: Privacy by Design, pp. 9-10.

[IAPP Glossary], Terms: Contact Tracing, Privacy by Design, Privacy by Default.