HVAC Control in the New Millennium.pdf - HVAC.Amickracing

HVAC Control in the New MillenniumFigure 7-4. Security supported by Windows NT and Microsoft IIS WebserverDigital CertificatesPublic keys can be authenticated with Digital Certificates (IDs).When a Digital Certificate is used with encryption, it secures the authenticityof the parties involved in the transaction (Figure 7-5).Digital Certificates provide a type of identification or passport thatallows users to navigate across multiple networks. The users retain theiraccess levels and credentials (Digital IDs) for each network. DigitalCertificates provide the capability to identify users, access levels andauthorized functions in multiple networks. When a user’s levels aredefined and a digital Certificate is issued, administrators can audit theuser’s transactions.Methods of outside intrusion that can compromise informationand security on a network include:Figure 7-5. Secure transmissions with digital ID certificates.©2001 by The Fairmont Press, Inc. All rights reserved.