A woman holding her smartphone checking a contact tracing app. Credit:mphillips007/iStock.com COVIDGuardian, the first automated security and privacy assessment tool, tests contact tracing apps for potential threats such as malware, embedded trackers and private information leakage. Using the COVIDGuardian tool, cybersecurity experts assessed 40 Covid-19 contact tracing apps that have been employed worldwide for potential privacy and security threats. Their findings include that: 72.5 per cent of the apps use at least one insecure cryptographic algorithm. Three quarters of apps contained at least one tracker that reports information to third parties such as Facebook Analytics or Google Firebase. Whilst most apps were free of malware, the Kyrgyzstan app Stop COVID-19 KG was discovered to have malware.