    @inproceedings {SelwynRussell2002,
	title = {Improving Performance in Global PKI using Virtual Certificates and Synthetic Certificates},
	booktitle = {Symposium on Cryptography and Information Security (SCIS{\textquoteright}02)},
	year = {2002},
	month = {January},
	pages = {1149-1154},
	abstract = {<p>A digital certificate may be used to inform the world of the public key of its owner. To guard against impersonations and fraud, the receiver needs to perform a series of checks. When a hierarchy of certificates is involved, and when there are large volumes of messages between two parties, as is frequent in commerce, the repeated validation of the same chain of certificates consume significant resources. This paper presents new concepts of virtual certificate and synthetic certificate which can be used to speed up repetitive processing of a chain with improved efficiency.</p>},
	author = {Selwyn Russell and Eiji Okamoto and Ed Dawson and Javier Lopez}
}
