Computer communications security: principles, standard protocols and techniques
Computer communications security: principles, standard protocols and techniques
Deferring trust in fluid replication
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To build effective public-key infrastructures, well-entrenched standards are essential because many different applications and different vendor products need to be supported and used. Standards for public-key certificate and certificate revocation list (CRL) formats are most important. The recognized standard in this area is ITU-T X.509, first published in 1988. In 1993, the Internet Privacy Enhanced Mail (PEM) proposals refined the use of X.509. However, more recently it has become apparent that there are several deficiencies in the X.509 formats and in the PEM refinements. Consequently, standards groups have undertaken an expedited activity to revise the X.509 formats by adding extensibility mechanisms and defining a set of standard extensions to satisfy a range of recognized needs. This paper outlines the status of this work as of mid-1995.