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Leopard Guides
Mac OS X provides a number of system-level authorization, authentication, and cryptographic services that software and hardware developers can use to build security into their products. In addition, Mac OS X provides programming interfaces to SSL/TLS that developers can use to transport data securely over a network.
A guided introduction for developers implementing security features in Mac OS X.   Essential information for developers building security into their products.   API references organized by framework.
Security Topics
View the complete Security Guides List.
Authentication
Services that aid in verifying the identity of a user or service. 		 
Authorization
APIs for determining whether an entity should be permitted to use a particular service. 		 
Carbon
Authentication, authorization, and cryptographic services for Carbon applications.
Cocoa
Authentication, authorization, and cryptographic services for Cocoa applications. 		 
Cryptography
APIs for the use of ciphers, encryption keys, and encryption algorithms. 		 
Darwin
Security-related programming techniques for the lowest level of Mac OS X.
Internet & Web
Authentication, authorization, and cryptographic services of interest to web developers. 		 
Mac OS X Server
Authentication, authorization, and cryptographic services for server applications. 		 
Networking
Programming interfaces for secure communication over a network.
Secure Storage
Programming interfaces and services for protecting stored data from unauthorized use.