X.500 is a standard developed by ITU-T and partnered by ISO, the standards is on electronic directory services, it was developed to the requirements of X.400 and for storing information about objects, such as organizations, persons, distribution lists, groups, certification authorities, etc.
This standard provides a structure model protocols for inter-directory communication between different systems and this allows directory information of each servers in the network to be distributed.
There are a number of protocols defined by X.500, it includes:
DAP (Directory Access Protocol)
DSP (Directory System Protocol)
DISP (Directory Information Shadowing Protocol)
DOP (Directory Operational Bindings Management Protocol)
These standards was developed with the reference to the OSI model and to allow clients from the internet to access x.500 using TCP/IP, LDAP was created as a alternative for DAP
The primary concept of X.500 is that there is a single Directory Information Tree (DIT), a hierarchical organization of entries which is distributed across one or more servers, called Directory System Agents (DSA). An entry consists of a set of attributes, each attribute with one or more values. Each entry has a unique Distinguished Name, formed by combining its Relative Distinguished Name (RDN), one or more attributes of the entry itself, and the RDNs of each of the superior entries up to the root of the DIT. As LDAP implements a very similar data model to that of X.500, Security
http://www.x500standard.com/index.php?n=X500.X500
Hey Sam, jeremy here. I realized that for your X.500 Security Feature, you mentioned the protocols of X.500. I also researched on the protocols of X.500 but didn't seem to find any security related things to X.500. I thought X.500 is a standard of the network? Maybe you could just state the simple security features used to protect the network from threats?
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