The fingerprint reader in the Apple iPhone 5S is integrated into the home button.
The company had previously announced at its Worldwide Developers Conference in June that all apps submitted to the App Store will need support the App Transport Security ATS feature starting January 1st, 2017.
It has not yet set a new deadline.
ATS is a feature first introduced in iOS 9 that forces apps to communicate with internet servers using encrypted HTTPS HTTP over SSL/TLS connections.
It s an improvement over the third-party frameworks that developers previously used to implement HTTPS because it ensures that only industry-standard encryption protocols and ciphers are used.
Even if ATS is enabled by default in iOS, on a technical level app developers can disable some of its features or can opt out of it entirely through various exception settings that ATS makes available.