The app issued by Chinese officials to manage Covid exposure during the Beijing Games has several security flaws, together with the potential for censorship or surveillance. The app does not encrypt sensitive information/transmissions adequately, according to news reports; and it appears to be able to flag certain terms as politically sensitive. The combination of problems is unique to China, but there are some issues endemic to Covid-tracking apps worldwide.
Many countries have rolled out track-and-trace apps in the wake of Covid, as one tool to manage the resumption of normal activities. Norway's and Japan's apps were flagged with security problems -- a real test of trust for technology used by governments to manage a public health crisis. China's combination of potential surveillance measures with run-of-the-mill security issues shows an egregious example of possible problems.