Information Technology - Open Systems Interconnection - The Directory: Public-key and Attribute Certificate Frameworks

n.A standard (X.509) published by the International Telecommunication Union that allows e-commerce transactions and communications to be secured as rigorously as needed - from consumer transactions with limited risk, to mission-critical business-to-business transactions.


ITU 2001 X.509 is viewed throughout the Information Technology (IT) industry as the definitive reference for designing applications related to Public Key Infrastructures (PKI). The elements defined within X.509 are widely utilized – from securing the connection between a browser and a server on the Web to providing digital signatures that enable electronic transactions to be conducted with the same confidence as in a traditional paper-based system.