External Security Managers (ESM)


External Security Managers (ESM) is a computing term that refers to an application outside the operating system that provides a layer of security to various system artifacts.

The term is typically seen when referring to security products on IBM z/OS platforms. An example is the RACF security package. [1]

External Security Managers (ESM) is best known on IBM Mainframe

On z/OS there are three primary External Security Managers (ESM)

In 1987, acquisitions made Computer Associates the largest independent vendor of mainframe infrastructure software and dominant vendor of OS/MVS security software with CA-Top Secret (#2 market share) and CA-ACF2 (#1 market share). IBM's RACF product held the #3 market share position. I really have no idea where market share of these products are today.

External Security Managers (ESM) is an Authentication Agent for z/OS platforms and can be utilized to provide Single Sign-On for applicaitons on the platform.

There is a DirXML ZOS BIDIRECTIONAL DRIVER that will work with most of the External Security Managers (ESM) on z/OS platforms.

More Information#

There might be more information for this subject on one of the following:
[#1] - http://en.wikipedia.org/wiki/External_Security_Manager retrieved 2012-10-15