Lenel Systems International, Inc.

Yuri Novozhenets

Michael Regelski

An improved security system for access control using smart card badges and readers, and one or more access controllers coupled to the readers. Each access controller has a database storing for each badge at least a Credential Identifier and an encrypted Authorization Code as badge number and issue code, respectively, and access privileges data for the cardholder. Each badge has memory storing a Credential Identifier and unique Smart Card Serial Number. The Authorization Code is encrypted using a badge's Credential Identifier and unique Smart Card Serial Number using a Site Secret Key. Each reader can read a badge's Credential Identifier and Smart Card Serial Number and generate an encrypted Authorization Code using the read Credential Identifier and Smart Card Serial Number, and the Site Secret Key. The access controller receives from the reader a request having at least the read Credential Identifier and generated Authorization Code as a badge number and issue code, respectively, and uses such in determining whether the cardholder has access at the reader.

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Rochester, NY, United States of America

Yuri Novozhenets