What architectural preference did the DP-3T protocol and the Google/Apple framework promote?

Answer

A decentralized approach where risk calculations occurred on the phone itself

The DP-3T protocol, which stands for Decentralized Privacy-Preserving Proximity Tracing, strongly favored a decentralized architectural decision, a stance later mirrored and supported by the unified framework provided by Google and Apple. In this decentralized model, the crucial task of calculating whether a user was exposed to an infected contact is performed directly on the user's handset, utilizing the locally stored proximity logs. This stands in opposition to centralized systems, where exposure data must first be uploaded to a government server, making the decentralized choice a major point of contention for health officials balancing epidemiological needs against user privacy expectations.

What architectural preference did the DP-3T protocol and the Google/Apple framework promote?

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