Nexor Directory Guardian

January 2014

As readers of this blog will know, NEXOR have recently moved offices. Part of the culture of the new building is a less clutter.  The journey involved opening many cupboards and draws that had not seen the light of day for a long time… until now…

The following document caught my attention:

QUAINT – Quipu Application Implemented to Ninety Three standards.
Authors: Colin Robbins, Alan Shepherd
July 1994.

Those of you who know your X.500 standards will recognise that this was a major update to the X.500 specifications and a significant investment. Looking back, the design was largely implemented and deployed as a successful commercial product on many customer sites.
The amusing part was on Section 8.4 of page 34. It starts

A Guardian DSA is a DSA that acts as a firewall between one X.500 community and another…

At the time Nexor was a very focused military messaging company. This must be one of the first documented references to a concept that has evolved to become Nexor Guardian, a key element of our Secure Information Exchange Platform, and the NATO IEG concept.

Wow, we’ve been in the guarding business for over 20 years!


This article was originally posted on the Cyber Matters blog – which gives “bite-size insight on cyber security for the not too technical”.

Author Bio – Colin Robbins

COLIN ROBBINSColin Robbins is Nexor’s Managing Security Consultant. He is a Fellow of the IISP, and a NCSC certified Security and Information Risk Adviser (Lead CCP) and Security Auditor (Senior CCP). He has specific technical experience in Secure Information Exchange & Identity Systems and is credited as the co-inventor of LDAP. He also has a strong interest in security governance, being a qualified ISO 27001 auditor.

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