On Macs, there is a ‘keychain’ where certificates and passwords are stored encrypted, and there are OS-level controls on access – either an OS prompt for a password, or biometric authentication.
My point was that apart from the Macs, there is no single system keychain Signal could use. What they do is perfectly normal and expected on a desktop OS.
What keychain exactly?
On Macs, there is a ‘keychain’ where certificates and passwords are stored encrypted, and there are OS-level controls on access – either an OS prompt for a password, or biometric authentication.
My point was that apart from the Macs, there is no single system keychain Signal could use. What they do is perfectly normal and expected on a desktop OS.