Security controls access to the all the information that is stored in the directory. This means that you can establish rules and grant rights to the users for the information in the directory. In addition, you can control the flow of information within your company, across networks of partners, and even your customers. Using the full service directory, you can manage the electronic transactions between companies through the cryptographic and key management systems. It includes both public-key cryptography and digital certificates for checking the authenticity of keys used in a public session.
Storage is the database structure for the directory.
It gives you the basic ability to save information in the database for future reference. The database is indexed, cached, and guarded from data corruption by a transaction system. Besides merely storing data, the database allows you to automatically control the type of data by applying classifications to the data structures. The classifications are flexible and extensible to provide future representations in the database. The database can be split into physical pieces and distributed or placed on multiple servers.