If you take mobile security seriously (and you should), then you might want to consider file encryption. This is all about encrypting files that you can either leave on your device and view when needed or share with others, knowing they can be viewed only by the recipient.
Among other additions, it features new topic sections concerning quantum security, single sign-on (SSO), and satellite communications: Quantum Security: Another VGT, Apple deployed postquantum cryptographic protection (PQ3) in iMessage in iOS 17.4 and macOS 14.4. This protection against future quantum-based attacks has now been extended in iOS 26, iPadOS 26, macOS 26, tvOS 26, and watchOS 26, including the introduction of CryptoKit, which developers can use to help protect the software they offer on the platforms.
Apple had already announced in January that Google's Gemini AI models would help power the upgraded version of Siri it delayed last year, but The Information's report indicates Apple might lean even more on Google so it can catch up in AI.