CCITT/ISO standards for secure message handling

Abstract

Aspects of the security services in the CCITT draft 1988 X.400 recommendations for message handling systems are examined. A brief introduction to relevant cryptographic concepts is followed by a description of how some of the security services can be provided. Key management, as defined within the CCITT draft X.500 recommendations for directory services, and as referenced by the X.400 recommendations, is also described. A discussion of certain limitations of the current X.400 security architecture is included.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>