Apple shook up the world of logins last week, offering a new single sign-on (or SSO) tool aimed at collecting and sharing as little data as possible. It was a deliberate shot at Facebook and Google, which currently operate the two major SSO services.

from https://www.theverge.com/2019/6/12/18662594/google-login-apple-sso-account-security-passwords-mark-risher
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