X.500

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The ITU-T's X.500 standard is a term from computer technology . It describes the structure of a directory service . This directory service can be accessed globally. There is no complete implementation of X.500, as the standard is very extensive and is based on an ISO / OSI stack , which made implementation difficult and computationally intensive and thus prevented success. A comprehensive directory service based on X.500 was developed between universities and research institutes in the early 1990s and is still in use.

The X.509 standard for a cryptographic public key infrastructure , which was originally intended to be based on X.500, achieved widespread use. A common protocol that is based on X.500, but does not meet all of its requirements, is LDAP .

Norms and standards

  • X.Imp500 Directory Implementors' Guide
  • X.500 Information technology - Open Systems Interconnection - The Directory: Overview of concepts, models and services
  • X.501 Information technology - Open Systems Interconnection - The Directory: Models
  • X.509 Information technology - Open Systems Interconnection - The Directory: Public-key and attribute certificate frameworks
  • X.511 Information technology - Open Systems Interconnection - The Directory: Abstract service definition
  • X.518 Information technology - Open Systems Interconnection - The Directory: Procedures for distributed operation
  • X.519 Information technology - Open Systems Interconnection - The Directory: Protocol specifications
  • X.520 Information technology - Open Systems Interconnection - The Directory: Selected attribute types
  • X.521 Information technology - Open Systems Interconnection - The Directory: Selected object classes
  • X.525 Information technology - Open Systems Interconnection - The Directory: Replication
  • X.530 Information technology - Open Systems Interconnection - The Directory: Use of systems management for administration of the Directory

See also

Individual evidence

  1. ^ HRZ announcements of the University of Giessen from 1994
  2. ^ X.500 page of the regional computing center of the University of Erlangen-Nuremberg . September 11, 2009. Archived from the original on June 15, 2010. Retrieved October 17, 2018.