1 Black skin and Asian skin have thicker and more compact dermis than white skin. This is also why blacks and Asians have fewer facial wrinkles than whites.  Black skin has more casual lipids and more moisture in the stratum corneum than white skin.
A software development kit (SDK or  devkit ) is typically a set of software development tools that allows the creation of applications for a certain software package, software framework, hardware platform, computer system, video game console, operating system, or similar development platform.
A Framework for Protecting Data Keys with Master Keys. The AWS Encryption SDK protects the data keys that encrypt your data by encrypting them under one or more master keys. By providing a framework to encrypt data keys with more than one master key, the Encryption SDK helps make your encrypted data portable.