This book describes, in lay terms, the contents of both the 1988 and 1993 editions of the ISO OSI Directory Standard (CCITT Recommendation X.500). Dr. Chadwick has been directly involved in the development of the new standard for ITU/ISO and is therefore well placed to write this explanatory text on the subject.

An in-depth account is given of all the features of the Standard and numerous examples of its application are provided throughout. The implications of the Standard are related to implementation details in terms of product usefulness, differentiation and ease of management. This book will appeal to students and researchers involved with computer communications as well as system administrators.

• Fully up-to-date with all features of 1993 edition of X.500 standard.
• Clearly describes all X.500 terminology such as DSA, DUA, DIT.
• Explains X.500 security features such as asymmetric encryption and access controls.
• Describes use of X.500 by other applications such as EDI and X.400.