On Tuesday, apple detailed some of the new features and changes to the cryptokit API, including portability and key derivation. It is reported that Apple introduced cryptokit into swift framework for the first time in IOS 13. It allows developers to perform some common encryption operations in the operation, such as message encryption and authentication. < / P > < p > earlier this year, Apple introduced some new encryption key features and announced the first open source swift crypto framework in February. < / P > < p > swift crypto allows portable encryption operations, including cross platform solutions that run on Linux / server. In addition, cryptokit now supports HMAC based extraction, extended key derivation (hkdf), and built-in support for PEM and Der formats. Didi Qingju bicycle has entered 150 cities