It didn't take long for some Mac users to note that trustd—a macOS process responsible for checking with Apple's servers to confirm that an app is notarized—was attempting to contact a host named but failing repeatedly.
Apple and Google say the change was based on conversations with state public health authorities, who told the companies they were having difficulty building apps themselves.Apple and Google say they are “committed to supporting public health authorities that have deployed or are building custom apps.”.
Security and privacy-focused technologists have pointed to a long list of potential flaws in Apple and Google's system , including techniques that could reveal the identities of Covid-19 positive users or help advertisers track them, false positives from trolls, mistaken self-diagnoses, and faulty signals between phones.
“The only way that these sort of things can be effective, if we take that model from other countries, is if you test far more cases than come up positive,” says Sham Kakade, a computer scientist at the University of Washington and a coauthor of PACT, a similar set of contact tracing protocols.
On Friday, the two companies announced a rare joint project to create the groundwork for Bluetooth-based contact-tracing apps that can work across both iOS and Android phones.
With a few seconds of physical access to a phone, even apps as common as Google Maps and Apple's Find My Friends can be tweaked to persistently share a user's location with another contact while offering the phone's owner no notification or warning, the researchers told me.