Verisign, Inc.

Ram A Moskovitz

Mahinda K De Silva

As part of a security infrastructure based on public-key cryptography, a first digital certificate ( ) is issued by a first certification authority ( ) to a first subscriber ( ) and binds the first subscriber ( ) to a first public key ( ). The first public key ( ) corresponds to a first private key held by the first subscriber ( ), and the first public key and the first private key form a key pair for use in public-key cryptography. The first digital certificate ( ) is digitally signed by the first certification authority ( ) and includes subscriber information ( ) pertaining to the first subscriber ( ) and related certificate information ( ) at least partially identifying a second digital certificate ( ). The second digital certificate ( ) is issued by a second certification authority ( ) to a second subscriber ( ) and is digitally signed by the second certification authority ( ). It binds the second subscriber ( ) to a second public key ( ) corresponding to a second private key held by the second subscriber ( ). The second public key and the second private key form a key pair for use in public-key cryptography. The first subscriber ( )is matched to the second subscriber ( ).

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Mountain View, CA, United States of America

Ram A Moskovitz