Updated Certificate for Game Center Authentication
February 1, 2017
On February 13, 2017, a new certificate for server-based Game Center Player ID verification will be available via the publicKeyUrl property of generateIdentityVerificationSignature, and the previous certificate will expire.
Apps that dynamically query the publicKeyUrl value will automatically use the new certificate, whereas apps that cache the certificate or hardcode the certificate URL may require an update. Learn more.